
^{14}N (1976AJ04)(See Energy Level Diagrams for ^{14}N) GENERAL: See also (1970AJ04) and Table 14.11 [Table of Energy Levels] (in PDF or PS). Shell model: (1970CO1H, 1970FR13, 1970HS02, 1970UL01, 1971NO02, 1972LE1L, 1972LI06, 1973IG02, 1973KU03, 1973SA30, 1974KI1B, 1975DI04, 1975MI12, 1975VE01). Collective and deformed models: (1972LA12). Cluster model: (1969BA1J, 1969KU1B, 1970KO26, 1971NO02, 1972LE1L, 1973KU03, 1975CH1V). Special levels: (1969HA1F, 1971HS05, 1971JA13, 1971MC15, 1971NO02, 1972LA12, 1972LI06, 1973SA30, 1974BO22, 1974NI1A, 1974VA24, 1975CH1V, 1975DI04, 1975MI12). Giant resonance: (1971JA14, 1973KI05, 1974FA1A, 1974HA1C, 1974MU13, 1974VE10, 1975VE01). Electromagnetic transitions: (1969HA1F, 1969WA1C, 1970HS02, 1971JA13, 1972BE1E, 1972LI06, 1972LO1D, 1972TA21, 1973HA49, 1973SA30, 1974HA1C, 1974MU13, 1974PI1C, 1974VE10, 1975VE01). Special reactions: (1969GA18, 1971AR02, 1971HE24, 1973KU03, 1973WI15, 1974KO25, 1975AR14, 1975HU14, 1975KA07, 1975KU01, 1975ME1F, 1975RE08, 1976YO1A). Astrophysical questions: (1972CL1A, 1973AR1E, 1973AU1B, 1973AU1D, 1973AU1C, 1973BO1R, 1973CA1B, 1973CO1B, 1973IB1B, 1973MI1D, 1973RA1D, 1973SA1J, 1973SC1T, 1973SM1A, 1973TA1E, 1973TA1D, 1973TR1B, 1974BE1R, 1974SN1B, 1974WI1F, 1975AU1D, 1975CO1Q, 1975DW1A, 1975EN1A, 1975GO1Y, 1975IB1A, 1975JA1F, 1975KA1L, 1975KE1A, 1975NO1D, 1975PE1E, 1975PR1B, 1975RA1M, 1975RY1A, 1975SC1H, 1975SH1N, 1975SN1A, 1975TR1A, 1975UL1A). Muon and neutrino capture and reactions: (1970BU1D, 1970DM01, 1970VA24, 1972BA1X, 1972BU29, 1973BA68, 1973KI12, 1973MU05, 1973MU11, 1973MU1B, 1974DU02, 1974EN10, 1974FU1B, 1975CA1H, 1975CH22). Pion capture and reactions (See also reaction 60.): (1969BA1L, 1969GO1C, 1969MA1C, 1970BA44, 1970BA1E, 1970DO04, 1970KO26, 1970NE1F, 1971AM1A, 1971FA09, 1971KO23, 1971MA38, 1971MA1T, 1971MA2A, 1972AG01, 1972FA14, 1972HU1A, 1972KO31, 1972SW1A, 1972YO1C, 1973AG05, 1973AG06, 1973AR1B, 1973BA2G, 1973BU1B, 1973CH20, 1973EI01, 1973GR1F, 1973KA19, 1973KA1D, 1973NY04, 1973ST1K, 1974HU14, 1974KO07, 1974LE25, 1974LI15, 1974NE18, 1974ST1G, 1974TA18, 1974ZA05, 1975AR02, 1975BA52, 1975DE1D, 1975EI1B, 1975VE05, 1976JA04). Kaon capture: (1969KU1B, 1971MA1T, 1972WA1F, 1974CA1H). Applied work: (1975BE1U, 1975OL1A). Other topics: (1968JO1C, 1970BO1M, 1970CO1H, 1970FO1B, 1970FR13, 1971BO1F, 1971HS05, 1971JA13, 1971MC15, 1972CA37, 1972LA12, 1972LE1L, 1972WA1F, 1973CL09, 1973CO16, 1973GO1H, 1973IG02, 1973KE1C, 1973KU03, 1973MA48, 1973PA1F, 1973PO1D, 1973RO1R, 1973RO1Q, 1973SH14, 1973SI21, 1974BO22, 1974CA1H, 1974DU11, 1974FA1A, 1974MU13, 1974SI04, 1974VA24, 1974ZU1A, 1975CA1N, 1975KU01, 1976MA04, 1976PA03). Ground state: (1969LE1B, 1971SC29, 1971SH26, 1971TA1A, 1972LE1L, 1972VA36, 1973CH38, 1973HO32, 1973SU1B, 1974AD1C, 1974DE1E, 1974DU02, 1974EN10, 1974MU13, 1975AL19, 1975BE31, 1975CA1N, 1976PA03).
= +0.40376077 ± 0.00000006 (1974SHYR); Q = +10 mb (1969FU11); see also (1968OK1C, 1969BO1D, 1974SHYR); r_{rms} = 2.55 ± 0.03 fm (1974DU02). Mass of ^{14}N: 14.003 074 001 (11) amu (1975SM02). See also (1971KE01, 1971SM01, 1972WA1G).
In reaction (a) E_{γ} = 1631.3 ± 1.3 [3.95 → 2.31], 4913.8 ± 3.0 [4.92 → g.s.], 3883.0 ± 1.9 [6.20 → 2.31] and 6443.7 ± 1.8 keV [6.44 → g.s.] have been observed [transitions shown in brackets]. The τ_{m} of ^{14}N*(6.44) is 620 ± 80 fsec [see also Table 14.13 (in PDF or PS)] (1969TH01). For reaction (b) see (1957NO17).
Recent measurements have been carried out at E_{α} = 1.0 to 5.0 MeV (1973VA25: n_{0}, n_{1}, n_{2+3}) and at 2.0 to 7.0 MeV (1975WI04: n_{0}). Observed resonances in these and in previous experiments are displayed in Table 14.14 (in PDF or PS). See also reaction 3.
Excitation functions have been measured to E_{α} = 26 MeV: see (1970AJ04) for a listing of the earlier references and (1975WI04: E_{α} = 2.0 to 10.7 MeV (p_{0}), to 7.5 MeV (p_{1}) and to 8 MeV (p_{2}, p_{3}); see also reaction 2). Observed resonances are displayed in Table 14.14 (in PDF or PS). (1975WI04) has expanded the angular distributions of the p_{0} → _{3} groups into Legendre polynomials and fitted the coefficients at the resonances corresponding to ^{14}N*(13.16, 13.24, 13.67, 13.76) obtaining J^{π} = 1^{+}, 2^{}, 2 or 3^{+}, and 1, respectively, for these states. (1975WI04) also finds that a surprising proportion of states have a higher cross section for neutron than for proton emission: the fluctuations of σ_{n}/σ_{p} at low E_{α} suggest sizable isospin impurities in the ^{14}N states (1975WI04).
Excitation curves have been measured for E_{α} up to 27 MeV: see (1970AJ04) for the earlier references and (1975SP04: E_{α} = 18 to 27 MeV; yields of 12.7 and 15.1 MeV γ). The lowenergy resonances (E_{d} < 2.2 MeV) are exhibited in Table 14.14 (in PDF or PS). At the higher energies the yield curves are fairly smooth (see (1968AL1C, 1975SP04)), although (1975SP04) report a sharp rise in the 15.1 MeV γyield ≈ 1 MeV above the ^{12}C*(15.1) + p + n threshold, a reaction which is not isospin forbidden.
The yield of 0.72 MeV γrays has been measured for E_{α} = 2.1 to 3.5 MeV by (1969GA01). Excitation functions for elastically scattered αparticles have been measured for E_{α} = 2.0 to 4.3 MeV (1973MO15) and for 5 to 30 MeV (1972DA04). In addition to two strong resonances in the α_{0} yields at E_{α} = 2.21 and 4.26 MeV (^{14}N*(13.19, 14.66)), two other states (^{14}N*(13.72, 14.25)) are required to fit the data: an Rmatrix calculation leads to J^{π} = 3^{+}, 1^{+} [see, however, (1975WI04)], 3^{+} and 2^{}, respectively for ^{14}N*(13.19, 13.72, 14.25, 14.66) (1973MO15). For reaction (b) see (1974JE1A).
At E(^{6}Li) = 5 MeV ^{14}N*(0, 3.95, 4.92, 5.11, 5.69, 5.83, 6.20, 6.44, 7.03, 7.97, 8.49, 8.98, 9.12, 9.39, 9.70, 10.10, 10.43 (T = 1, weakly populated), 11.06) are populated ((1966MC05), and private communication). (1975FO01) have examined ^{14}N*(9.13) in detail and conclude that it is a closely spaced doublet of which one member is populated in ^{13}C(p, γ) and has been assigned J^{π} = 2^{}, and the other member, populated here, has J^{π} = 3^{+}. This assignment is based on a DWBA analysis of the angular distributions at E(^{6}Li) = 16.5 and 21.0 MeV which shows the contributions of several L values and, in particular, L = 0. See also reaction 19. Branching ratios for the γdecay of ^{14}N states are displayed in Table 14.12 (in PDF or PS) (1966CA07). See also reaction 1 (1969TH01).
Triton groups corresponding to a number of ^{14}N states have been observed at E(^{7}Li) = 5 MeV: see (1966MC05) and reaction 6. See also (1974KO1G).
The capture γrays (reaction (a)) have been studied at E(^{3}He) = 0.9 to 2.6 MeV (1970BL10: γ_{0}; θ = 0° and 90°) and 1.5 to 5.8 MeV (γ_{0}) and 2.0 to 5.8 MeV (γ_{1}) (1973MA1W: 90°). When the barrier penetration factor has been removed the lowenergy work shows a single resonance at E(^{3}He) ≈ 1.4 MeV (^{14}N*(21.8)), Γ_{c.m.} = 0.65 MeV (1970BL10). (1973MA1W: prelim. results) report two broad resonances at E_{x} = 23.4 and 25.0 MeV in the γ_{0} yield and at 24.0 MeV in the γ_{1} yield. The excitation function at 0° in the range E(^{3}He) = 1.5 to 5.6 MeV for n_{0} (reaction (b)) shows a broad peak at E(^{3}He) = 4.15 MeV which may indicate the existence of a ^{14}N state at E_{x} ≈ 24.0 MeV, Γ ≈ 1 MeV (1966DI04). The excitation function for reaction (b) has also been measured for E(^{3}He) = 6 to 18 MeV (1967HA20). Yield curves for protons (reaction (c)) have been measured for E(^{3}He) = 3.0 to 5.5 MeV (p_{0}, p_{1}, p_{1} + p_{2} + p_{3}): they are rather featureless (1959HO01). This is also true for the ground state deuterons of reaction (d) in the same energy interval (1959HO01). Yield curves for reaction (e) have been measured for E(^{3}He) = 6 to 18 MeV (1967HA20) and 10 to 30 MeV (1965BR1B). See also ^{13}C and ^{13}N. For reactions (d, e, f) see ^{12}C, ^{11}C and ^{11}B in (1975AJ02). The excitation functions for αparticle groups (reaction (g)) have been measured for E(^{3}He) = 0.9 to 2.15 MeV (1966LO15: α_{0} → α_{4}) and 2.2 to 5.5 MeV (1965FO06: α_{0} → α_{3}). No significant resonance behavior is seen except for the α_{2} group which, in the 15° excitation function, exhibits a resonance at E(^{3}He) = 4 MeV, Γ ≈ 1 MeV (1965FO06). See also ^{10}B in (1974AJ01). The excitation function for reaction (h) to ^{6}Li_{g.s.} + ^{8}Be_{g.s.} has been measured for E(^{3}He) = 1.4 to 5.8 MeV: no pronounced structure is observed (1967YO02). At E(^{3}He) = 25.20 to 26.25 MeV the excitation functions for the transitions to ^{8}Be*(0, 16.63, 16.91, 17.64) are smooth, indicating a predominantly direct reaction mechanism (1974DE25).
Angular distributions have been measured for E_{α} to 13.9 MeV [see (1970AJ04) for the earlier references], E_{α} = 3.7 to 7.9 MeV (1975VA06: n_{0}, n_{1}, n_{2}) and at E_{α} = 12.6 to 14.8 MeV (1972CI01, 1973CI02: n_{0}).
See (1970AJ04).
At E(^{11}B) = 114 MeV the relatively strongly populated states are ^{14}N*(5.83, 8.96, 12.8) [J^{π} = 3^{}, 5^{+} and 4^{+}, respectively] (1974AN36).
At E_{d} = 1.5 MeV the capture cross section is < 1 μb (1955AL16). The yield of γ_{0} is nearly flat from E_{d} = 9 to 11.7 MeV and then exhibits broad resonance structures at E_{d} = 12.10 and ≈ 12.8 MeV, with Γ = 0.5 ± 0.1 and 1.5  2 MeV, respectively [^{14}N*(20.6, 21.2)]. The γ_{1} and γ_{2} yields have also been measured [1972DI1B: prelim. results].
Resonances in the yields of neutrons and protons are displayed in Table 14.15 (in PDF or PS). Recent measurements of the yields of these particles are listed in Table 14.16 (in PDF or PS). For angular distributions of neutrons see ^{13}N. See also (1971MU18, 1973BI1G), (1971DU1B; theor.) and (1972LU1B, 1973WE19, 1975LE1K; applied work). For angular distributions of protons see ^{13}C. See also (1971PU01, 1973BE25) and (1971DU1B, 1974ST05, 1975GR12, 1975MO1L; theor.). For spallation measurements see (1971BA70, 1971JA02, 1975FU01). Polarization measurements are summarized in Table 14.17 (in PDF or PS) [and in Table 14.12 (in PDF or PS) (1970AJ04)]. The polarization transfer coefficient has been measured for E_{d} = 6 to 14 MeV for (nbar)_{0} and (nbar)_{1}. The (nbar)_{0} dependence shows some influence from the compound nucleus (1974LI1K). See also (1975TE1A). For neutron polarization studies see also (1971TH1E, 1975KA26), (1971WA1D) and (1974BO51, 1974BO53, 1975BO1W; theor.). For proton polarization studies see also (1971GO1E, 1971HA1R) and (HA70P, 1970PE1B, 1972GO27, 1972KO30, 1972SE09, 1974BO52, 1974SA11, 1974SA20, 1975SE07; theor.).
Reported resonances are displayed in Table 14.15 (in PDF or PS). Recent measurements of yields of d_{0} are listed in Table 14.16 (in PDF or PS). For a discussion of the relative yields of ^{12}C*(12.7, 15.1) see ^{12}C in (1975AJ02). See also (1970VE06, 1971PU01, 1971ZA04, 1975JA1A) and (1969IW1A, 1969KO1B, 1970SO11, 1974IN07, 1974ST05, 1975GU10; theor.). The (d, np) processes are discussed in reaction 38 of ^{13}C and in reaction 21 of ^{13}N.
The cross section rises from ≈ 0.1 mb at E_{d} = 16 MeV to ≈ 10 mb at 20 MeV (1955WI43).
Reported resonances are displayed in Table 14.15 (in PDF or PS). Recent measurements of the yields of αgroups are listed in Table 14.16 (in PDF or PS) [see also Table 14.11 (in PDF or PS) in (1970AJ04)]. For angular distributions see ^{10}B in (1974AJ01). The major interest in this reaction has been the study of the yield of the α_{2} group to the J^{π} = 0^{+}, isospin "forbidden" T = 1 state. In particular, the work of (1971RI15, 1972SM07) has shown that while the α_{0}, α_{1} and α_{3} yields show only weak fluctuations, the α_{2} "forbidden" yield shows narrow resonances which implies that the source of the isospin mixing (at least in the region which they, and the subsequent work of (1974JO01) studied: E_{d} = 7.2 to 16 MeV) is due to states in the ^{14}N compound nucleus. The ratio of the σ_{t} for the α_{2} group compared to the σ_{t} for the "allowed" groups is ≈ 1%, an order of magnitude greater than predicted by direct or multistep processes (1972SM07). Partial wave analyses lead to the resonance parameters shown in Table 14.15 (in PDF or PS) (1972SM07, 1974JO01). For an earlier discussion of these problems see (1970AJ04). See also (1970WE03).
For reaction (a) see (1970AN1E) and ^{8}Be in (1974AJ01). For reaction (b) see (1975FU01) and ^{7}Be in (1974AJ01).
Angular distributions have been measured at E_{t} = 1.12 to 1.68 MeV (1971MA46: n_{0}, n_{1}, n_{2}) and at 8 MeV (1972CO01: to ^{14}N states with E_{x} < 8.7 MeV). In the latter experiment Lassignments are suggested (1972CO01). For τ_{m} measurements see Table 14.13 (in PDF or PS) (1968AL12).
Many proton groups have been observed: see Table 14.18 (in PDF or PS). Angular distributions have been measured at many energies up to E(^{3}He) = 25.3 MeV: see (1970AJ04) for a listing of the earlier work and (1969SC1G: 2.22  3.60 MeV; p_{0}, p_{1}, p_{2}), (1970CL1D: 3.0 to 4.05 MeV; p_{0}, p_{1}, p_{2}), (1971DU03: 11.95 MeV; to states shown in Table 14.18 (in PDF or PS)) and (1972BR60: 13.3 MeV; to states with E_{x} < 8.7 MeV). The reaction mechanism involves the compound nucleus, at least for E(^{3}He) <12 MeV: see (1973HE09, 1973SO04) and ^{15}O. Extensive studies of p'γ and p'p correlations (the latter from ^{12}C(^{3}He, p')^{14}N*(p)^{13}C_{g.s.}) have led to the confirmation and determination of J^{π} of many of the unbound states [see Table 14.18 (in PDF or PS) and (1972NO08, 1974NO01, 1974NO1G)] and of Γ_{γ}/Γ [see Table 14.12 (in PDF or PS) and (1972BA56, 1972NO08)]. Table 14.12 (in PDF or PS) also displays branching ratios and radiative widths studied earlier. These studies led to J^{π} = 0^{} or 1^{} for ^{14}N*(4.92), J^{π} = 2^{} for ^{14}N*(5.11), odd parity for ^{14}N*(5.83), even parity for ^{14}N*(6.20, 6.44), J = 2 for ^{14}N*(7.03): see (1970AJ04) for a fuller discussion and a listing of the relevant references. For τ_{m} measurements see Table 14.13 (in PDF or PS) (1970AJ04, 1973HA40). (1973BEVW) find 0.5 ≤ g ≤ 0.85 for the 3^{} state ^{14}N*(5.83). See also (1970CA28), (1970AN1D) and (1970LK1A, 1973LI15, 1974GR39, 1974NE18; theor.).
Angular distributions of deuterons corresponding to T = 0 states in ^{14}N have been measured at E_{α} = 42 to 55 MeV: see Table 14.19 (in PDF or PS) and (1970AJ04) for a listing of the references. The deuteron spectrum is dominated by very strong groups corresponding to the (d_{5/2})^{2}, J^{π} = 5^{+}, state at 8.96 MeV, and to a state at 15.1 MeV (1962HA40, 1966RI04). See also (1974VA1M, 1975VA1H), (1970AN1D) and (1971BU1K; theor.).
At E(^{6}Li) = 20 MeV, αgroups corresponding to most of the T = 0 states with E_{x} < 12.7 MeV are reported: see Table 14.19 (in PDF or PS). The spectrum is dominated by the αgroup corresponding to the 5^{+} state at 9.0 MeV (1968ME10). The α_{1} group to the 0^{+}; T = 1 state at 2.31 MeV state has an intensity (< 3% of α_{0}) which decreases sharply from E(^{6}Li) = 4 to 5.5 MeV, while the intensities of the α_{0} and α_{2} groups increase rapidly (1965CA06). Angular distributions of αparticles have been reported for E(^{6}Li) = 2.0 to 20 MeV: see (1970AJ04) for the earlier references, (1970JO09, 1970JO1D: 5.6 to 14.0 MeV; α_{0}, α_{2}, α_{3} + α_{4}) and (1973WH03, 1975WH03: 33 MeV; α to ^{14}N*(0, 3.95, 4.92, 5.11, 5.69, 5.83, 6.20, 6.44)). At that energy the reaction proceeds primarily by direct interaction (1973WH03); multistep mechanisms may be very important (1975WH03). For τ_{m} measurements see Table 14.13 (in PDF or PS). For angular correlation measurements see (1974NO1G). See also (1971LA1B) and (1970OG1A, 1973OG1A).
See (1969RO1G, 1970LK1A; theor.).
At E(^{11}B) = 114 MeV the spectrum is dominated by groups to the 5^{+} state at E_{x} = 8.96 MeV and to one or more of the states at 12.8 MeV, presumably the 4^{+} one (1974AN36, 1975PO10). See also (1972SC1L, 1973SC1J). The angular distribution of the group to ^{14}N*(8.96) is a smoothly varying, exponential function of angle (1975PO10): see the analyses by (1965SA07, 1975PO10). See also (1970AN1D, 1970LK1A; theor.).
This reaction has been studied at E(^{12}C) = 114 MeV: the spectrum is dominated by ^{14}N*(8.96) [J^{π} = 5^{+}] but there is substantial population also of ^{14}N*(5.83) [3^{}] and of a state at E_{x} = 11.2 MeV (1974AN36). See also (1971SC1F, 1972SC1L, 1972SC21).
See (1968RO1D; theor.).
Observed resonances are displayed in Table 14.20 (in PDF or PS). The decay schemes of various levels of ^{14}N, as derived from the γspectra in this and other reactions, are exhibited in Table 14.12 (in PDF or PS) [see (1970AJ04) for the earlier references and see (1972RE10)]. For the τ_{m} of bound ^{14}N states see Table 14.13 (in PDF or PS) (1971BI03, 1972RE10). The lowenergy capture crosssection yields an extrapolated Sfactor at E_{p} = 25 keV (c.m.), S_{0} = 6.0 ± 0.8 keV · b (1960HE14). See also (1970AJ04) and (1971BA1A, 1972CA1N, 1973CL1E, 1973TR1E; astrophys. considerations). The capture cross section rises from (7.7 ± 1.8) × 10^{10} b at E_{p} = 100 keV to (9.8 ± 1.2) × 10^{9} b at E_{p} = 140 keV (1961HE02). Following is a summary of the reasons for the assignments of J^{π}; T to some of the lower resonances displayed in Table 14.20 (in PDF or PS): for a fuller discussion and complete references see (1970AJ04) and see Table 14.12 (in PDF or PS). ^{14}N*(7.97): angular distribution of the γrays is consistent with J^{π} = 2^{}. ^{14}N*(8.06): width of resonance, isotropy of γrays show l_{p} = 0: J^{π} = 1^{} from ^{13}C(p, p); E1 transition to g.s. is uninhibited, e.g., T = 1 [but 1.4% 8.06 → 2.3 transition [E_{x} = 2312.6 ± 0.3 keV (1971BI03)] shows T = 0 admixture: α^{2} = 0.046 (1972RE10)]. The strong transition 8.06 → 5.69 [3.5% (1972RE10)] permits either E1 or M1, ΔT = 1. Since 5.69 → 2.31 is seen ^{14}N*(5.69) cannot have J^{π} = 0^{+}, and 2^{+} is excluded by the strength of the 8.62 → 5.69 transition. It is then J^{π} = 1^{}; T = 0 [the isospin mixing α^{2} = 0.09 (1972RE10)]; E_{x} = 5690.5 ± 1.5 keV (1971BI03). ^{14}N*(8.49, 8.96, 9.13) correspond to anomalies in the cross section. The nature of their γdecays [see Table 14.12 (in PDF or PS)] and the angular distribution leads to J^{π} = 4^{}, 5^{+} and 2^{}; T = 0, 0 and 0, respectively (1965DE19). However, work by (1975FO01) in ^{10}B(^{6}Li, d) shows that ^{14}N*(9.13) is a doublet: the state populated in reaction 6 has J^{π} = 3^{+}. The structure at E_{p} = 1.70 MeV will therefore have to be reanalyzed. ^{14}N*(8.62) [J^{π} = 0^{+} from ^{13}C(p, p)] shows strong transitions to ^{14}N*(0, 3.95, 5.69): T = 1 (1959WA16). The strength of the 8.62 → 3.95 decay shows it is dipole and therefore J = 1 for ^{14}N*(3.95) (1959WA04) [E_{x} = 3947.6 ± 0.4 keV (1971BI03)]. The strength of the transition 8.62 → 6.21 and the angular correlation 8.62 → 6.21 → g.s. is consistent with J^{π} = 1^{+}; T = 0 for ^{14}N*(6.20) [E_{x} = 6203.7 ± 0.6 keV (1971BI03)]. ^{14}N*(8.79) [J^{π} = 0^{} from ^{13}C(p, p)] has a large Γ_{γ} consistent with E1 and T = 1. ^{14}N*(9.17): angular correlation and angular distribution measurements indicate J^{π} = 2^{+} for that state, 3^{} for ^{14}N*(6.44) [see, however, Table 14.11 (in PDF or PS)] and J = 2 for ^{14}N*(7.03). The angular distribution of the γrays from 10.23 → 2.31 is consistent with J^{π} = 1^{+} for ^{14}N*(10.23): T = 0 from M^{2}(M1) (1963RO17) [see, however, Table 14.11 (in PDF or PS)]. The γ_{0} angular distribution is consistent with J = 2 for ^{14}N*(10.43): the similar decay characteristics of this state and of ^{14}N*(9.17) suggest that they are both J^{π} = 2^{+}; T = 1 (1964RO03). Below E_{p} = 5.5 MeV only γ_{0} can be observed in the capture radiation. (1971RI13) have observed a number of resonances in the γ_{0} yield and in the yield of the ground state γrays from ^{13}C*(3.09, 3.68, 3.85): these are shown in Table 14.20 (in PDF or PS) in the range E_{p} = 3.7 to 6.6 MeV [see reaction 25 in (1970AJ04) for the earlier work]. Angular distributions and measurements of Γ_{γ0} lead to the J^{π} values shown. Above E_{p} = 7 MeV the γ_{0} yield shows broad structure and the giant dipole resonance at E_{x} = 22.5 and 23.0 MeV (1971RI13). Measurements by (1975PA18) of the γ_{0} and γ_{1} 90° yields for E_{x} = 23 to 33 MeV show that the J^{π} = 1^{}; T = 0 giant dipole resonance is concentrated between E_{x} = 15 and 23 MeV, that the T = 2 resonances reported by (1971RI13) at E_{x} = 23.7 and 24.2 MeV do not exist, and that there is no evidence for the T = 2 GDR between E_{x} = 25 and 29 MeV (1975PA18). The 90° yields of γrays to T = 0 states (4.9 < E_{x} < 5.9 MeV) and to T = 1 states (8.0 < E_{x} < 9.5 MeV) have been measured for E_{x} = 23 and 26 MeV, respectively, to E_{x} = 33 MeV; the former is quite constant at ≈ 4 μb/sr, the latter slowly rises to a value of ≈ 2 μb/sr: by comparison the γ_{1} yield is ≈ 1 μb/sr (1975PA18). See also (1970SI1E, 1973BE1R), (1973SU1E) and (1975VE01; theor.).
The elastic scattering has been studied for E_{p} = 0.14 to 11 MeV (see (1970AJ04) for a listing of the older work) and at E_{p} = 4.6 to 5.3 MeV (1974GM01: also p_{1} → p_{3}). For observed resonances see Table 14.20 (in PDF or PS); for angular distributions see ^{13}C. Polarization measurements for the p_{0} group have been carried out at 7, 14.5 and 32.9 MeV (see (1970AJ04)) and at E_{p} = 30.4 MeV (1972GR02; also for p_{1}). For spallation measurements see (1973RA37).
The yield of neutrons has been measured from threshold to E_{p} = 13.7 MeV: see (1970AJ04). Observed resonances are displayed in Table 14.21 (in PDF or PS) (1959GI47, 1961DA09). The ratio of the reaction cross section at E_{p} = 22.8 MeV to the n_{0} yield is 1.06 ± 0.07: thus there is little competition of γrays from excited states of ^{13}N with neutron emission making this a convenient fast neutron calibration source (1975LI11). Polarization measurements are reported for E_{p} = 6.9 to 12.3 MeV (1965WA02: n_{0}) and 7 to 15 MeV (1974LI1J). See also ^{13}N and (1971GE12; theor.).
A polarization measurement has been reported at E_{p} = 7 MeV by (1969GU02). See also (1970AJ04) and ^{12}C in (1975AJ02).
At E_{p} = 49.6 MeV polarization measurements have been carried out for the tritons and ^{3}He ions to the mirror groups ^{11}B*(0, 2.12, 4.45, 5.02, 6.74, 12.91) and ^{11}C*(0, 2.00, 4.32, 4.80, 6.48, 12.50) (1974MA12). Integrated cross sections for populating the first four states in ^{11}B and ^{11}C have been measured at several energies in the range E_{p} = 26.8 to 43.1 MeV (1975MI01). See also ^{11}B and ^{11}C in (1975AJ02).
Excitation functions have been measured from E_{p} = 5.5 (α_{0}), 6.0 (α_{1}), 7.0 (α_{2}), 8.0 (α_{3}), 10 (α_{4}), 11 (α to ^{10}B*(5.11)) to 18 MeV. Total cross sections have also been obtained for the production of ^{6}Li, ^{9}Be and ^{10}B: the latter shows a great deal of structure. The consequences for astrophysical problems are discussed by (1975OB01).
Observed neutron groups are displayed in Table 14.22 (in PDF or PS). Angular distributions have been reported at many energies up to E_{d} = 12 MeV: see (1970AJ04) for the earlier references and (1973BO10: E_{d} = 4.5, 5.0, 5.5 MeV; to states shown in Table 14.22 (in PDF or PS)), (1975BO35: E_{d} = 6.5 MeV; to states in Table 14.22 (in PDF or PS)). Comparison of relative spectroscopic factors obtained in this reaction and in reaction 32 are shown in Table 14.23 (in PDF or PS): it appears that S_{rel} for ^{14}N*(2.31) [T = 1] is smaller in this reaction than in the (^{3}He, d) reaction although simple DWBA calculations would suggest that the factors would be the same in both proton pickup reactions. The τ · T terms appears to be energy dependent: see Table 14.23 (in PDF or PS) (1968CO24). Observed γrays attributed to transitions in ^{14}N are shown in Table 14.20 (in PDF or PS) of (1970AJ04): see Table 14.12 (in PDF or PS) here for a general review of radiative decays in ^{14}N. The angular correlation of internal pairs conclusively establish the parities of ^{14}N*(4.92, 5.11, 5.69) as odd (1964WA05). For τ_{m} measurements see Table 14.13 (in PDF or PS) (1974RU1B). See also (1972RE1C) and ^{15}N.
Angular distributions have been studied at E(^{3}He) = 13 and 17 MeV (1966SI02: d_{0}, d_{1}, d_{2}) and 15 MeV (1966HO15, 1969HO23, 1971FO05: see Table 14.22 (in PDF or PS)). Relative spectroscopic factors are displayed in Table 14.23 (in PDF or PS) and compared with those from ^{13}C(d, n)^{14}N. See also (1967SP09) and (1970BO1K, 1972DZ1A; theor.).
Angular distributions have been measured at E_{α} = 27 MeV for the αgroups to ^{14}N*(0, 2.31, 3.95, 4.92, 5.11): relative spectroscopic factors are 1.0, 0.2, 0.3, 4.4, 5.5 (1974KE06). See also (1974DM01; 23.2, 23.7, 25.3 MeV; t_{0}). [The earlier work at E_{α} = 46 MeV (see (1970AJ04)) has not been published.]
At E(^{7}Li) = 34 MeV, angular distributions have been obtained for the transitions to ^{14}N*(0, 2.31, 3.95) (1973SC26).
This reaction has been studied at E(^{11}B) = 113.5 MeV (1967PO13) and 114 MeV (1974AN36). The relative population of the observed ^{14}N states in dependent upon whether ^{10}Be_{g.s.} or ^{10}Be^{*}_{3.37} is involved: in all cases the cross section is greater if the 2^{+} state in ^{10}Be is populated. Difficulties are encountered in separating the two sets of ^{14}N states: see (1974AN36).
See ^{14}C.
Neutron thresholds have been observed at E_{p} = 671.5 ± 0.5 and 3149.6 ± 1.1 keV (1956SA06) and at E_{p} = 4910 ± 8 keV (1960BA34) corresponding to the ground state of ^{14}N and to excited states at 2311.9 ± 1.2 keV and 3.952 ± 0.008 MeV. Angular distributions and polarizations of the neutrons corresponding to ^{14}N*(0, 2.31, 3.95) have been obtained at E_{p} = 6 to 14 MeV (1967WO05) and 7.2 to 13.3 MeV (1971WO03), respectively. The angular distributions for the ground state transition require a tensor interaction: the results are consistent with a tensor strength which is not energy dependent. The polarization measurements for the 1^{+} states do not clearly favor a tensor component in the effective twobody force (1967WO05, 1971WO03). See also ^{15}N and (1969SC1H, 1972AU1A; theor.).
At E(^{3}He) = 44.8 MeV, triton groups are observed corresponding to all the known levels of ^{14}N with E_{x} < 7.1 MeV. Triton groups were also seen to unresolved states with E_{x} = 8.0  9.5 MeV, to ^{14}N*(10.43) and to excited states with E_{x} = 12.49 ± 0.04, 12.83 ± 0.05 and 13.70 ± 0.04 MeV. Angular distributions were obtained for nine of the triton groups and analyzed using a local twobody interaction with an arbitrary spinisospin exchange mixture. Dominant L = 0 transitions are found to ^{14}N*(2.31, 3.95, 13.7), L = 1 to ^{14}N*(5.11), L = 2 to ^{14}N*(0, 7.03, 10.43) and L = 3 to ^{14}N*(5.83) (1969BA06). See also reaction 47 and (1969SC1H; theor.). Angular distributions have been studied for reaction (b) for the transitions to ^{14}N*(0, 3.95) [L = 2 and 0, respectively]: ^{14}N*(3.95) carries at least 95% of the GT strength (1976GO1U).
The total absorption over the range E_{γ} = 9 to 31 MeV is dominated by a single peak at 22.5 MeV [estimated σ ≈ 29 mb, Γ ≈ 2  3 MeV] and appreciable strength extending beyond 30 MeV. The cross section cannot be accounted for solely by the (γ, n) and (γ, p_{0}) processes: particle unstable excited states of ^{13}C, ^{13}N are involved (1969BE92). The combined (γ, n) and (γ, pn) cross section begins to rise rapidly above 18 MeV, reaches its maximum value of 15 mb at 23.3 MeV and exhibits structure at about 19, 20.5 and 26 MeV. The main peak [Γ ≈ 3.5 MeV: see (1970AJ04)] at 23.3 MeV appears to be split into two absorption levels (1970BE54, 1975BE60, 1975BE1F: monoenergetic photons). Maxima reported in other experiments and "breaks" in the (γ, n) activation curve are listed in (1970AJ04). See also (1968KA1D, 1971FR11, 1971KA70). The (γ, p_{0}) and (γ, p_{2}) cross sections and angular distributions have been measured in the giant resonance region by (1972CA34, 1974BA37). The authors infer that the giant dipole states [(p_{3/2})^{1}(2s1d)] which decay by p_{0} emission to ^{13}C*(3.68) carry ≈ 90% of the E1 strength and do not contribute substantially to the (γ, p_{0}) process which is populated by (p_{1/2})^{1}(2s1d) giant dipole states. Above E_{γ} = 22 MeV dwave emission from 2^{} states appears to dominate the (γ, p_{0}) cross section (1972CA34, 1974BA37). For reaction (d) see (1970SH06, 1972GE11) and ^{13}C. For reactions (d, e, f, g) see (1970AJ04). See also (1972BU1J, 1973DI1C, 1975BR1F) and (1969ER1A, 1971AN08, 1972GO23, 1973KI05; theor.).
Absorption measurements have led to the determination of τ_{m} (see Table 14.13 (in PDF or PS)) and of Γ_{γ} (see Tables 14.12 (in PDF or PS) and 14.24 (in PDF or PS)): see the references in (1970AJ04) and the newer work by (1974RAZD, 1975RA22). (1966SW01) find E_{x} = 7029 ± 6 keV for ^{14}N*(7.03): the angular distribution of the γrays is consistent with J = 2.
The r.m.s. radius of ^{14}N is given as 2.540 ± 0.020 fm (1973FE13, 1975SC18). See also (1971BE25: 2.493 ± 0.033 fm), (1970DA20: 2.64 fm), (1970AJ04) and (1969BE21, 1970BR1C, 1973TH1B). Form factors have been determined at E_{e} = 60.7 to 122.0 MeV for ^{14}N*(2.31, 3.95, 4.92, 5.11, 5.69, 5.83): the reduced transition probabilities for these states, in singleparticle units, are, respectively, 0.065 ± 0.020, 1.70 ± 0.14, (1.1 ± 0.5) × 10^{7}, 4.1 ± 1.0, (3.8 ± 2.1) × 10^{8} and 6.1 ± 1.3 (1974EN01). Inelastic scattering (at θ = 180°) gives evidence for the excitation of ^{14}N*(8.91, 9.17, 10.43): the Γ_{γ0} are given in Table 14.24 (in PDF or PS) (1962ED02, 1963BA19, 1968CL05). In addition (1968CL05) report the excitation of a state with E_{x} = 11.01 ± 0.07 MeV. Partial Γ_{γ} for cascade transitions of ^{14}N*(9.17, 10.43) are shown in Table 14.12 (in PDF or PS) (1968CL05). See also (1970AJ04), (1970BR1E, 1972THZF, 1974DE1E) and (1971BA2T, 1973GA19, 1974PE08; theor.).
Angular distributions of elastically and inelastically scattered neutrons are displayed in Table 14.23 (in PDF or PS) of (1970AJ04). See also (1974HO1E) and (1971MI12; theor.). Observed γrays are shown in Table 14.25 (in PDF or PS) (1969DI1B, 1971NY03, 1972NY02). See also (1970DI1A, 1972NI05).
Angular distributions of elastically and inelastically scattered protons have been measured and analyzed at a number of energies up to E_{p} = 155 MeV: see Tables 14.26 (in PDF or PS) here and 14.23 (in PDF or PS) in (1970AJ04). Compound nucleus effects are appreciable below E_{p} = 15 MeV (1973HA54). The inclusion of a tensor term is necessary in the analysis of the distribution of the p_{1} group (to ^{14}N*(2.31) [J^{π} = 0^{+}; T = 1]): see (1970CR03, 1973AU1E, 1973HA54). See also ^{15}O and (1971ES1A). Observed inelastic proton groups are shown in Table 14.27 (in PDF or PS). See also (1969SC1H, 1970SA06, 1971MC15, 1972AU1A, 1973KA04, 1974OD01; theor.). Reaction (b) at E_{p} = 19 MeV proceeds at least in part through an intermediate state in ^{14}N at E_{x} ≈ 11.2 MeV (1965DE21). See also (1970WE09, 1970WE1J) in ^{13}C, (1972LO1F) and (1972JA1C; theor.). For reaction (c) see (1970AJ04).
Angular distributions of elastically and inelastically scattered deuterons have been obtained for E_{d} up to 52 MeV: see Table 14.23 (in PDF or PS) in (1970AJ04) and (1967FL10: E_{d} = 2.01 to 5.50 MeV; d_{0}), (1970DU04: E_{d} = 5.47 (d_{1}) and 6.37 (d_{2}) to 10.16 MeV), (1974JA25: E_{d} = 10.02, 12.02 MeV: d_{0}, very accurate, at a few angles) and (1974BU06: E_{d} = 15 MeV; d_{0}). Inelastic deuteron groups are discussed in Table 14.27 (in PDF or PS). The deuteron group to the 0^{+}; T = 1 state ^{14}N*(2.31) is isospin forbidden: its intensity is 1  3% of the deuteron group to ^{14}N*(3.95) for E_{d} = 7.1 to 10.2 MeV (1970DU04). The deuteron group to ^{14}N*(8.06) [T = 1] is not observed: see Table 14.27 (in PDF or PS). See also (1970AJ04), ^{16}O in (1971AJ02, 1977AJ02), (1970PI1A) and (1970ME25, 1971SI24, 1972DM01, 1972FO07, 1973FA1J, 1975GU10; theor.).
Elastic differential cross sections have been measured at four angles at E_{t} = 20.03 MeV (1974JA25). See also (1973FA1J; theor.).
Angular distributions of elastically and inelastically scattered ^{3}He ions have been measured at E(^{3}He) up to 44.6 MeV: see Table 14.23 (in PDF or PS) in (1970AJ04) and (1970KN01: 4.5, 7.0 MeV; elastic). At E(^{3}He) = 44.6 MeV, twelve ^{3}He groups are reported corresponding to states in ^{14}N: see Table 14.27 (in PDF or PS) (1969BA06). The angular distributions were analyzed using a local twobody interaction with an arbitrary spinisospin exchange mixture. A comparison of the cross sections of the reactions ^{14}N(^{3}He, t)^{14}O_{g.s.}, ^{14}N(^{3}He, ^{3}He')^{14}N*(2.31) and ^{14}C(^{3}He, t)^{14}N(0) [which all correspond to transitions between identical initial and final states] shows that they are roughly equal, as would be expected from charge independence, once detailedbalance, isospin coupling and phasespace corrections have been applied (1969BA06). See also (1973FA1J; theor.).
Angular distributions of elastically and inelastically scattered αparticles have been measured for E_{α} = 11 to 104 MeV: see Table 14.23 (in PDF or PS) in (1970AJ04) for the earlier references and (1969FE10, 1970AG08: E_{α} = 19.8  23.1 MeV; α_{0}), (1970GA25, 1971GA44: 21.7 MeV; α_{0}, α_{2}, α_{3+4}, α_{5+6}, α_{7+8}, α_{9}), (1972KU19: 26.6 MeV; α_{0}), (1972LO08: 29.98 MeV; α_{0}) and (1970HA1G: 104 MeV; α_{0}). See also (1972OE01, 1974YO1B). See Table 14.27 (in PDF or PS) for the observed αgroups. Generally the intensity of the α_{1} group is weak, typically a few percent of the α_{0} or α_{2} groups: see (1959AJ76, 1966HA19). See also (1970CH1D). Reduced transition probabilities are reported by (1966HA19): B(E2)(↓)/e^{2} = 6.5 and 3.3 fm^{4}, respectively for ^{14}N*(3.95, 7.03); B(E3)(↓)/e^{2} = 40 and 60 fm^{6}, respectively for ^{14}N*(5.11, 5.83). See also (1970AJ04) and ^{18}F in (1972AJ02, 1978AJ03). See also (1974HA1C) and (1971MU1H, 1972DM01, 1972RA34, 1973FA1J; theor.).
The angular distribution involving ^{6}Li_{g.s.} + ^{14}N_{g.s.} has been measured at E(^{6}Li) = 32 MeV by (1971GR44, 1971ZE1C). See also (1974FL1A).
See ^{9}Be in (1974AJ01).
The elastic angular distribution has been measured at E(^{10}B) = 100 MeV (1975NA15). For reaction (a) see also (1970IS1A). The elastic scattering angular distributions (reaction (b)) have been studied at E(^{14}N) = 41, 77 and 113 MeV (1971LI11).
Elastic angular distributions have been measured at E(^{14}N) = 21.3 MeV (1971VO01), 22.5 MeV (1969HE06), 65, 84 and 88 MeV (1971KO11, 1974KO38, 1975KO1E), 78 MeV (1970VO02: and ^{12}C*(4.4)), 118 MeV (1974AN36: and ^{12}C*(4.4)), and 155 MeV (1974BI1E, 1975NA11, 1975NA15: and various ^{12}C states). See also (1975ZE1C) and (1975MO23, 1975RA33, 1975VO1B; theor.). At E(^{14}N) = 155 MeV the selective population of certain ^{14}N states is observed and angular distributions are reported for the transitions to ^{14}N*(0, 8.96, 12.7) (1975NA11). For yield measurements see (1974JO1J, 1974ST1N, 1975ZE1C), (1972SC1L), (1972MA74, 1974GA1L, 1975DE09; theor.) and ^{12}C in (1975AJ02).
The elastic angular distribution has been measured at E(^{14}N) = 19.3 MeV (1971VO01). See also (1973MC1J, 1973VO04, 1975DE09; theor.). For reaction (b) see (1971VO1D, 1971DE09, 1975VO1B; theor.).
Elastic angular distributions have been studied for E(^{14}N) = 4.99 to 20.22 MeV (1969JA15). For yield measurements see (1969JA15, 1973GO01, 1973RE13, 1973ST1L, 1974ST1N). See also (1973ST1A) and (1972PA31, 1973KA46, 1973PA1L, 1973PA1M, 1973SC1K, 1974VE05; theor.).
Elastic angular distributions have been measured for E(^{14}N) = 8.08 to 18.05 MeV (1969JA15), 25 MeV (1971BO1U), 79 MeV (1976MO03) and 155 MeV (1975NA15). For yield measurements see (1969JA15, 1970SI09, 1973GO01, 1974ST1N). See also (1973KA46, 1974BA40, 1975MO23, 1975VO1B; theor.).
The decay proceeds almost entirely to the J^{π} = 0^{+}; T = 1 state of ^{14}N at 2.31 MeV: see ^{14}O. Measurement of the γray energy from the decay of ^{14}N*(2.31) leads to E_{x} = 2312.87 ± 0.10 keV (1968FR08), 2312.89 ± 0.10 keV (1967CH19). See also reaction 1 in ^{14}O.
Angular distributions have been obtained for the deuterons corresponding to ^{14}N*(0, 2.31, 3.95) (1961BE12: E_{p} = 18.6 MeV) and to ^{14}N*(0  8.06, 8.62, 8.91, 8.96 + 8.98, 9.17  10.43, 10.81, 11.05, 11.24 + 11.29, 11.36  11.66, 11.75, 11.95, 12.20, 12.50, 12.61, 12.79 + 12.82, 13.17 + 13.24, 13.71 + 13.72) (1969SN04, 1969SN1B: E_{p} = 39.8 MeV). Spectroscopic factors were extracted by DWBA analysis of the l_{n} = 1 pickup angular distributions. Γ = 210 ± 30 keV for ^{14}N*(13.71). Weak deuteron groups to ^{14}N states at E_{x} = 6.70, 7.40 and 7.60 MeV are reported [see, however, Table 14.11 (in PDF or PS)] (1969SN04). See also (1972PA1A).
Not reported.
Observed states in ^{14}N are displayed in Table 14.28 (in PDF or PS) together with the derived spectroscopic factors (1966BA13, 1970BO21). See also (1962CL12, 1969HO23, 1974HO1M).
At E(^{15}N) = 30, 32 and 45 MeV the angular distributions involving ^{14}N*(0, 2.31) have been studied: they are symmetric about 90° for the transition to the T = 1 analog state ^{14}N*(2.31) (1975GA17).
At E_{π} = 230 MeV, γrays from the population of ^{14}N*(2.31, 3.95, 5.11, 5.83) are observed (1974LI15). See also (1971KO23).
Not reported.
See (1972BO17) and (1974GO1G; theor.).
Angular distributions have been measured at E_{p} = 27 MeV (1973IN05: to ^{14}N*(2.31)), 32.2, 36.6, 43.5 MeV (1975MI01: to ^{14}N*(0, 2.31, 3.95)), 39.8 MeV (1973HO10: to ^{14}N*(0, 2.31, 3.95)); L = 0 + 2, 0, 0 + 2, respectively), 43.7 and 54.1 MeV (1964CE02, 1970HA23, 1971FL04, 1974MA12: to ^{14}N*(0, 2.31, 3.95, 5.11, 7.03, 9.17, 11.05); some with pol. p [also observed ^{14}N*(10.43, 12.50)] and 49.5 MeV (1970NE1B, 1970NE17: pol. p to ^{14}N*(0, 2.31)). A number of comparisons have been made of the ratio of (p, ^{3}He) to the T = 1 state at 2.31 MeV and of (p, t) to the analog ground state of ^{14}O: see reaction 10 in ^{14}O. See also (1969SC1F, 1972HA1X, 1974AD1B), (1974ST16; theor.) and ^{17}F in (1977AJ02).
Angular distributions of αparticles have been measured at many energies up to E_{d} = 40 MeV: see Table 14.25 (in PDF or PS) in (1970AJ04) for the earlier measurements and (1971GR2B: 0.9  2.0 MeV; α_{0}), (1970CA1C: 1.0  2.0 MeV; α_{0}), (1973JO13: 2 to 14 MeV; α_{0}, α_{1}), (1971TH03: 4.405, 4.578, 4.710 MeV; α_{0}), (1970AL1F: 10.6 to 12.6 MeV; α_{0}), (1971JA04: 14.6, 15.0, 15.8 MeV; α_{1}) and (1974VA1M, 1975VA1H: 40 MeV; α_{0}, α_{2}). Alpha groups have been seen corresponding to most known states of ^{14}N with E_{x} ≤ 11.5 MeV (1968JO07: E_{d} = 5 to 9 MeV) and (1974VA1M) observe ^{14}N*(11.05). The yield of the isospin forbidden α_{1} group [to ^{14}N*(2.31)] has been studied for E_{d} = 2 to 15 MeV by (1969JO09, 1973JO13): the intensity of the isospin group is strongly dependent on E_{d} and on the angle of observation. The α_{1} reaction appears to proceed almost exclusively by a compound nuclear process and its study leads to the determination of a large number of ^{18}F states: the average isospin impurity in ^{18}F for 10 ≤ E_{x} ≤ 20 MeV is 3  10% (1973JO13). For further discussions see (1969DE29, 1971JA04) and (1970AJ04). Measurements on the absolute cross sections of this reaction [E_{d} = 3.6 to 5.3 MeV] and its inverse [^{14}N(α, d)^{16}O] are consistent with the principle of detailed balance. An upper limit of 0.2% is assigned to the timereversal noninvariant part of the reaction amplitudes (1971TH03). See also (1967SP09), (1970FO1B; theor.) and ^{18}F in (1978AJ03).
At E_{α} = 42 MeV the transitions involving (^{14}N_{g.s.} and ^{6}Li*(0, 3.56)), (^{14}N*(2.31) + ^{6}Li_{g.s.}) and (^{14}N*(3.95) + ^{6}Li_{g.s.}) have been studied by (1972RU03).
See (1974MI1F).
See (1972KU1H; theor.).
See (1974RO04).
See (1973SE02) and (1975RO20; astrophys. questions) in ^{18}F (1978AJ03).
See (1967DE03).
