
^{15}N (1970AJ04)(See Energy Level Diagrams for ^{15}N) GENERAL: See Table 15.4 [Table of Energy Levels] (in PDF or PS) here. Model calculations: (1957HA1E, 1959BR1E, 1959FE1B, 1960TA1C, 1961BA1E, 1963BU1C, 1963KU1B, 1964MA1G, 1965CO25, 1965FA1B, 1965GR1H, 1965GU1A, 1965ZA1B, 1966EL08, 1966SO05, 1967CO32, 1967EL03, 1967PA05, 1968EL1A, 1968HO1H, 1968MA2B, 1968SH08, 1968WA04, 1968ZH05, 1969CH1R, 1969EL1B). General calculations and reviews: (1964EV1A, 1965BE1B, 1966OL1C, 1966WI1E, 1967FA1A, 1967LO03, 1968BI1C, 1968ZH1B, 1969HA1G, 1969IW1B). Electromagnetic transitions: (1965RO1N, 1966HA31, 1966PO11, 1966RO1P, 1966RO1U, 1966WA1E, 1967KU1E, 1967PO1J, 1967WA1C, 1968BI1C, 1968SH08, 1968YA1E, 1968ZH06, 1968ZH1B, 1969KH1C, 1969ZH1A). Meson interactions: (1969KA1R). Ground state: μ = 0.28309 nm (1962BA63, 1964LI14, 1967CO1D). See also (1961BR13, 1964ST1B, 1965IC1A, 1965MA1T, 1966MA1V, 1966WI1E, 1967SH14, 1968PE16, 1968RO1E, 1969CH1R, 1969FU11).
The yield of p_{0} and p_{1} (reaction (a)) for E(^{6}Li) = 3.84 to 6.40 MeV shows some broad structure: analysis in terms of Ericson fluctuation theory gives a value of ≈ 0.4 MeV for the average level width at E_{x} = 28 MeV in ^{15}N (1967SE08). The excitation functions for α_{0}, α_{1} and α_{2+3} (reaction (b)) [E(^{6}Li) = 2 to 4 MeV: (1961LE01)] and the yield of ^{13}N (reaction (c)) [E(^{6}Li) = 1.5 to 3.5 MeV: (1961NO05)] show a smooth increase in the cross section with energy. For reactions (d) and (e) see (1962MC12). See also (1963BA1Q).
At E(^{7}Li) = 2.9 MeV, γrays are observed which are assigned to the ground state decay of ^{15}N*(9.05, 9.83, 10.80) (1964CA18). See also (1957NO17).
At E(^{6}Li) = 4.9 MeV, thirty proton groups are observed corresponding to ^{15}N states with E_{x} < 16.8 MeV. Angular distributions have been measured for the proton groups corresponding to ^{15}N*(5.27 + 5.30, 6.32, 7.16 + 7.30, 7.57, 8.31, 8.58, 9.05 + 9.15) (1966MC05). The groundstate γdecay of ^{15}N*(9.83, 10.80) is reported by (1964CA18). See also (1963MO1B).
At E(^{7}Li) = 5.2 MeV, thirty deuteron groups are observed corresponding to ^{15}N states with E_{x} < 15.1 MeV. Angular distributions have been measured for the deuteron groups corresponding to ^{15}N*(0, 5.27 + 5.30, 6.32, 7.16 + 7.30, 7.57, 8.31, 8.58, 9.05 + 9.15, 9.83) (1966MC05). See also (1963MO1B). The ground state γdecay of ^{15}N*(8.31, 9.05, 9.83, 10.80) is reported by (1964CA18).
Reported resonances are displayed in Table 15.5 (in PDF or PS) (1954BE08, 1955SH46, 1956BO61, 1958HA1B, 1963ED01, 1963MA28, 1966MA04). See also (1962GO1J, 1963GO1J, 1965TS1A) and (1966WE1B). See also ^{14}N.
Reported resonances are listed in Table 15.5 (in PDF or PS) (1955SH46, 1959LE28, 1963ED01, 1963MA28). Partial widths for several resonances are listed by (1959LE28, 1963MA28). See also ^{14}C.
The yield of ground state deuterons has been measured for E_{α} = 17 to 22 MeV by (1967AL16). See also ^{13}C.
At E(^{6}Li) = 4.72 MeV and at E(^{7}Li) = 5.00 MeV, angular distributions are reported for the deuterons and the tritons corresponding to ^{15}N*(0, 5.27 + 5.30, 6.32, 7.16 + 7.30, 7.57, 8.31, 8.58, 9.05 + 9.15) (1966MC05). See also (1963MO1B). Gamma rays are observed in reaction (a) which are assigned to the ground state transitions of ^{15}N*(9.15, 9.83, 10.80) (1964CA18). See also (1963HO1E) and (1964HA09).
See (1963HO1E).
At E(^{16}O) = 27, 30, 32.5 and 35 MeV, angular distributions corresponding to transitions to ^{15}N*(0, 6.32) have been measured by (1965BO14, 1966BO22): the ground state angular distributions show strong diffraction structure. See also (1969GO1R, 1969BR1D, 1969KA1G).
Reported resonances are listed in Table 15.6 (in PDF or PS) (1961VA13, 1962GU01, 1962KU09, 1963NI04, 1965SE05, 1969ET01). The triton yield has been measured for E_{t} = 9 to 13 MeV by (1965GL04). See also (1962NE1D, 1964GR1H, 1967CH35), ^{11}B and ^{12}C in (1968AJ02), and ^{14}C and ^{14}N.
Angular distributions of the protons corresponding to the ground state transition have been measured at E_{α} = 13.4 to 16.0 MeV (1967IV1B), 16.1 to 19.0 MeV (1960PR13), 19.7 to 22.1 MeV (1963YA1C), 20.6 to 22.2 MeV (1961KO04), 25 to 39 MeV (1959NO38) and at 42 MeV (1962LI07). Angular distributions are also reported for the groups to ^{15}N*(5.27 + 5.30, 6.32, 7.16 + 7.30 + 7.57) (1959NO38: 34.6 MeV) and ^{15}N*(6.32) (1962LI07: 42 MeV). See also (1962EI03, 1969GL1D), (1961KR1A, 1962HO1D, 1962TE1B, 1963DA1B, 1964DA1D, 1964KE1C, 1965NE1D, 1966HI1C, 1967RO1K; theor.) and (1959AJ76).
Angular distributions have been measured at E(^{7}Li) = 3.2 to 4.0 MeV (1962HO06; α_{0}, α_{1+2}, α_{3}) and 30.3 MeV (1969GL07; α_{0}, α_{1+2}, α_{3} and the α's corresponding to ^{15}N*(7.35, 7.6, 8.6, 9.2, 10.1, 10.9, 12.8, 13.5, 15.2). (1969BA2U) report the excitation of ^{15}N*(12.5, 13.3, 14.9, 15.6, 16.2, 16.8, 18.9, 19.8) and (1969GL07) also report α groups corresponding to ^{15}N*(11.8, 16.5) and, possibly ^{15}N*(17.1, 18.3). The mean lifetime of ^{15}N*(9.83) < 1.9 × 10^{13} sec (see Table 15.7 (in PDF or PS)): E_{γ} = 4562.6 ± 4.0 keV (^{15}N*(9.83 → 5.27)) (1969TH01). See also (1960SH05) and (1969GI1B, 1969RO1G).
For reaction (a) see (1969BR1D); for reaction (b) see (1969RO1G).
Observed resonances are displayed in Table 15.8 (in PDF or PS) (1950RI57, 1955MA76, 1963AL21, 1963DE19). Excitation functions have recently been measured for E_{d} = 0.8 to 1.3 MeV (1961JA09; n_{0}, n_{1}, n_{2}, n_{3}, n_{5}), 2.0 to 3.2 MeV (1963AL21: 7.03 MeV γray) and 3.2 to 4.0 MeV (1963DE19; n_{0}). See also (1960VA11). Polarization measurements are reported for E_{d} = 2.5 to 4.0 MeV (1967ME1N; n_{0}, n_{1}, n_{2}) and 2.8 MeV (1965GA1G; n_{3}, n_{4}, n_{5}). See also ^{14}N.
Observed resonances are displayed in Table 15.8 (in PDF or PS) (1941BE1A, 1950CU13, 1953KO42, 1956MA46). Excitation functions have recently been measured for E_{d} = 1 to 3.4 MeV (1968LI1L; p_{0}, p_{1}), 3.0 to 4.0 MeV (1965LA09: ^{14}C*(6.09, 6.73, 7.34)), 3.1 to 4.1 MeV (1963DE19; p_{0}), and 4.1 to 6.2 MeV (1968CO04; p_{1}). See also (1963AL21). See also ^{14}C.
Excitation functions for elastically scattered deuterons have been measured for E_{d} = 1 to 3.4 MeV (1968LI1L) and 4.5 to 5.7 MeV (1968CO04).
Observed resonances are listed in Table 15.8 (in PDF or PS) (1956MA35). (1968LI1L) report measurement of the t_{0} excitation function for E_{d} = 1 to 3.4 MeV. A polarization study has been made at E_{d} = 12.3 MeV (1969DE1H; t_{0}, t_{1}). See also ^{12}C.
Observed resonances are listed in Table 15.8 (in PDF or PS) (1956MA35). See also (1966KL06, 1966KL1F, 1968CO04, 1968LI1L).
Not reported.
Observed proton groups and γrays corresponding to ^{15}N states are listed in Table 15.9 (in PDF or PS) (1959YO25, 1966GA08, 1966WA08, 1967PH03). Gammaray branching ratios obtained by (1965WA16, 1966PE04, 1966WA08) are displayed in Table 15.10 (in PDF or PS) which also shows J^{π} values obtained from angular correlation measurements. The two states at E_{x} = 9.16 MeV [see reactions 32 and 39] are separated by 2.5 ± 0.5 keV (1968ST10). See also (1959BR79). The τ_{m} for ^{15}N*(7.16, 7.57) are 0.115 ± 0.025 psec and 0.15 ± 0.05 psec, respectively: see Table 15.7 (in PDF or PS) (1966LI07). Angular distributions of the ground state protons have been measured for E(^{3}He) = 8.7 to 10.93 MeV (1962AL01). See also (1959AJ76). See also (1967YO1C, 1968WE15), (1963CL1A, 1966PR1B) and ^{16}O in (1971AJ02).
This reaction has been studied at E_{α} = 40.1 MeV: see Table 15.9 (in PDF or PS) (1969LU07).
Angular distributions have been measured for E(^{6}Li) = 3.2 to 3.8 MeV for the α_{0} and α_{1+2} groups (1964BL1B).
See (1969TH01).
See (1966PO1E, 1967PO1E, 1967VO1A).
Resonances for capture γradiation are listed in Table 15.11 (in PDF or PS) (1959FE1C, 1959HE1D, 1968HE12, 1968SI1F, 1969SI04). A combination of ^{15}N*(10.80) and (9.83) permits a good account of the low energy (n, n) and (n, γ) cross sections (1959HE1D). The thermal (n, p) cross section can be ascribed to the E_{p} = 1.5 MeV resonance (^{15}N*(11.62)) (1955BA44: see also ^{14}N(n, γ)^{15}N). See also (1959AJ76) and (1969TI05). Table 15.10 (in PDF or PS) displays branching ratios obtained in this and in other reactions. The angular distributions of γrays at the E_{p} = 0.35 MeV resonance (^{15}N*(10.54)) leads to assignments of J = 5/2, (5/2), 3/2 and 5/2, respectively, for ^{15}N*(5.27, 7.16, 7.30, 10.54) (1960HE13). The angular distribution of the (10.81 → 8.31) γray fixes J = 1/2 for ^{15}N*(8.31) (1968SI1E). A triple correlation study by (1968SI1E) of the decay of ^{15}N*(10.80) to the E_{x} = 9.15 MeV states suggests J = 3/2 for the upper and J = 5/2 for the lower of these two states. Lifetimes for various ^{15}N states have been measured by (1968COZV): see Table 15.7 (in PDF or PS). See also (1960FR09, 1961FR1D, 1969ZH1A).
The elastic scattering has been studied for E_{p} = 0.34 to 2.7 MeV. At the E_{p} = 527 keV resonance (see Table 15.11 (in PDF or PS)), the scattering is consistent with dwave formation of a J^{π} = 3/2^{+} state. No anomalies are observed at E_{p} = 0.35 and 0.63 MeV (1959HE1D). However, anomalies are observed at E_{p} = 1.16, 1.29, 1.47, 2.02, 2.07 and 2.48 MeV: the parameters of these are displayed in Table 15.11 (in PDF or PS) (1968HA27, 1968HE12). The 2.48 MeV anomaly is due to a J^{π} = 5/2^{+}; T = 3/2 state at E_{x} = 12.52 MeV (which is the analog to the first excited state of ^{15}C), and is distinct from the J^{π} = 5/2^{+} resonance in ^{14}C(p, n)^{14}N observed at E_{p} = 2.45 MeV (1968HE12). See also (1968IW1A, 1969IW1E).
Resonances reported by (1951RO16, 1955BA44, 1956SA06, 1959FE1C, 1960BA34, 1961HA12, 1962HA20, 1968HE12) are listed in Table 15.11 (in PDF or PS). In addition to these, (1961HA12) report (in an abstract) a broad resonance corresponding to a T = 3/2 state of ^{15}N at E_{x} = 13.6 MeV. At E_{p} = 1.79 MeV, the distributions favor 5/2^{}, but 3/2^{} is not excluded (1955BA44: see also (1953KA20)); a computation of the cross section favors J = 3/2 (1956SA06). At E_{p} = 1.88 MeV, the angular distribution is consistent with the J^{π} = 1/2^{} assignment from ^{14}N(n, n)^{14}N (1955BA44). The E_{p} = 2.27 MeV state has J = 3/2 or 5/2; the σ_{n}n clearly indicates ther latter (1955BA44, 1956SA06). For ^{15}N*(11.62) (E_{p} = 1.51 MeV), the proton reduced width indicates a singleparticle level, while the neutron reduced width is only 10^{3}. This is consistent with the assignment T = 3/2, corresponding to the ground state of ^{15}C (1955BA44, 1956BA16, 1959FE1C). See also (1967VO1B, 1969BA1N, 1969TI05). Polarization measurements are reported at E_{p} = 7.2, 8.8 and 10.4 MeV by (1969WO1J; n_{0}, n_{1}, n_{2}).
Angular distributions have been determined at E_{d} = 1.3, 1.8 and 2.8 MeV (1967CO1R; n_{0}, n_{1+2}, n_{3}, n_{4+5+6}), 1.31 to 3.08 MeV (1963IM01; n_{0}), 2.10 and 2.33 MeV (1963IM01; n_{1+2}, n_{3}, n_{4+5+6}) and 3.10 MeV (1967LA11; n_{0}, n_{1+2}, n_{3}, n_{4}, n_{5}, n_{6} and ^{15}N*(8.31, 9.06, 9.16, 9.22)). The transitions to ^{15}N*(5.30, 9.06) involve l_{p} = 0: these states therefore have J^{π} = 1/2^{+} (1967LA11). See also (1959AJ76) and (1961CH14, 1964MO1G). Studies of the γdecay of ^{15}N states reached in this and in other reactions are summarized in Table 15.10 (in PDF or PS): see (1965WA16). See also (1967CH19).
At E(^{3}He) = 14 MeV, angular distributions of the deuterons corresponding to ^{15}N*(0, 5.28, 5.30, 6.33) have been measured and analyzed by DWBA: the relative spectroscopic factors for the first four states of ^{15}N are 1, 0.50, 0.34, 0.07 in good agreement with the predictions of (1957HA1E). Angular distributions of the d_{0} group are also reported at E(^{3}He) = 1  9 MeV by (1963WE15, 1966DU1B, 1968DA1N).
Not reported.
The thermal cross section is 80 ± 20 mb (1957BA18), 75 ± 7.5 mb (1964ST25). This large cross section is not understood in terms of the present level structure in ^{15}N: see (1959AJ76). Observed capture γ rays are displayed in Table 15.12 (in PDF or PS) (1963MO1C, 1967TH05, 1968GR14). The very accurate γray energy determinations of (1968GR14) show that two states at E_{x} ≈ 9.15 MeV are involved in this reaction as previously suggested by (1966WA08). The lower of the two, at E_{x} = 9.1518 MeV, decays predominantly to the ground state. The other state at E_{x} = 9.1549 MeV, which is preferentially fed in this reaction, decays primarily by cascades via ^{15}N*(5.27, 5.30, 6.32, 7.16) (1968GR14). See also reactions 21 and 39, (1968GRZY, 1968ST10) and Table 15.10 (in PDF or PS). Recoil Doppler broadening of cascade γrays has been measured by (1969WE07): the derived τ_{m} are listed in Table 15.7 (in PDF or PS). See also (1968CA1J). Observation of nonisotropic correlations in the C → 6.32 cascade means that J ≠ 1/2 for ^{15}N*(6.32): the results are consistent with J = 3/2 (1964BA02). The importance of measuring the (n, γ) cross section at E_{n} = 0.47 and 0.66 MeV for astrophysical considerations is suggested by (1968FO1A). See also (1960CA02, 1965JA09, 1969HO1X) and (1958GR01, 1964LI1C).
The thermal (bound) scattering cross section is 5.51 b (1961WI1A). The scattering amplitude (bound) is a = 9.19 ± 0.11 fm (1965DO14) [a = 9.14 ± 0.10 fm is recommended by (1964ST25)]. See also (1969BA1P). The coherent scattering cross section is 10.5 ± 0.3 b (1964ST25). Recent cross section measurements are listed in Table 15.13 (in PDF or PS). Cross section data are summarized in (1964ST25), while angular distribution data are displayed in (1963GO1M). Observed resonances are listed in Table 15.14 (in PDF or PS) (1951JO23, 1952HI12, 1955FO27, 1959HA13, 1966FO1D, 1966FO1E, 1966MA2K, 1968BO36, 1968JO1F): for a discussion of the evidence leading to J^{π} assignments, see (1959AJ76). See also (1960BA34) and (1966AG1A, 1967BE1F, 1968IW1A, 1969IW1E). A polarization measurement has been made at E_{n} = 3.5 MeV by (1962OT01). See also (1965TA07).
Recent measurements of cross sections for this reaction are listed in Table 15.13 (in PDF or PS) (1960FE12, 1960MC05, 1961BR1A, 1961RA06, 1962CE1B, 1965BO42, 1965GR41, 1967PA27): see the summaries in (1964ST25, 1966JE1B). See also (1964HE18, 1966CS1C, 1967CS02) and (1959AJ76).
The thermal crosssection is 1.81 ± 0.05 b (1964ST25), 1.83 ± 0.03 b (1961HA43). A number of resonances are reported by (1950JO57), (1959GA14) and (1963EN01): see Table 15.14 (in PDF or PS). The results are summarized in (1964ST25, 1966JE1B). See also (1960BU1C, 1968DA1F). Recent crosssection measurements are listed in Table 15.13 (in PDF or PS) (1959GA14, 1966CS1B, 1967CS03, 1969DI1B). See also (1964FO1A, 1969BA1N) and (1959AJ76).
For reaction (a) see (1967LI06) and (1959AJ76). For reaction (b) see (1966CS1B, 1967CS03).
For reaction (a) see (1959GA14, 1966SC21, 1967LI06, 1967RE01) and (1968AJ02). For reaction (b) see (1967MO21). For reaction (c) see (1967MO21). See also (1960FA10, 1964SA1E), Table 15.13 (in PDF or PS), the summaries in (1964ST25, 1966JE1B) and (1959AJ76).
Recent crosssection measurements for reaction (a) are displayed in Table 15.13 (in PDF or PS): these include measurements of cross sections for several different αgroups (1959GA14, 1966SC21) and γrays (1959HA13, 1968CO1W, 1969DI1B). For summaries of the experimental evidence, see (1964ST25, 1966JE1B). Observed resonances are listed in Table 15.14 (in PDF or PS) (1950JO57, 1959GA14, 1966SC21). See also (1960FA10), (1960BU1C, 1963CH1C) and (1964GA1A, 1968GA1M; theor.). For reaction (b), see (1960FA10).
Proton groups corresponding to levels of ^{15}N are listed in Table 15.15 (in PDF or PS) (1950MA65, 1954SP01, 1956DO41, 1965AL19, 1966GA08, 1966GO1J, 1969PH02). The J^{π} assignments are based on PWBA and DWBA analyses: see (1959AJ76), (1969PH02) and Table 15.16 (in PDF or PS) for a listing of recent angular distribution studies in the range E_{d} = 0.5 to 27 MeV. See also (1966RO1V). The angular distributions of protons corresponding to ^{15}N*(6.32) and the pγ angular correlation fixes J^{π} = 3/2^{} for that state (1961GO03). (1960HO1B) has looked for additional states of ^{15}N with E_{x} ≈ 7 MeV: he finds the upper limits to proton groups corresponding to 7.10 < E_{x} < 7.31 to be 1%, and to be 5% of the intensities of groups to known nearby states for 7.31 < E_{x} < 7.57 MeV. Recent very accurate γray energy measurements have been reported by (1967CH19) [E_{γ} = 5299.03 ± 0.43 and 5270.60 ± 0.46 keV] by (1966AL18) and by (1965WA16): the derived E_{x} values are displayed in Table 15.15 (in PDF or PS). Branching ratios have been determined by (1965WA16, 1968GI11, 1968ST10) and are shown in Table 15.10 (in PDF or PS) together with the multipolarities determined by (1965WA16). Lifetime measurements are listed in Table 15.7 (in PDF or PS) (1965AL19, 1967BI11, 1968GI11). The two states of ^{15}N at E_{x} = 9.15 MeV [see Table 15.10 (in PDF or PS) for branching ratios] are separated by 2.5 ± 0.5 keV (1968ST10, 1969YO1C): see also reaction 32. See also (1961JA23, 1961TE02, 1962ST17, 1963GO1L, 1965HE1B), (1959BO1C, 1960BE1B, 1961KO1E, 1963TA1A, 1964BA1V, 1964ST1J, 1966HO1D; theor.), (1959AJ76) and ^{16}O in (1971AJ02).
The angular distribution of the deuterons corresponding to the ground state of ^{15}N has been measured at E_{t} = 1.50, 1.83 and 1.98 MeV. The cross section at E_{t} = 2 MeV is 48 mb: this large value and the energy and angular behavior of the differential cross section suggest that this reaction may proceed by a cluster exchange process (1964SC09).
At E_{α} = 56 MeV, the angular distribution of the ground state ^{3}He particles has been measured by (1969GA11) and analyzed by DWBA: the ratio of the (α, ^{3}He) and (α, t) cross sections at this energy is 1.50 ± 0.15. See also (1968GA1C).
The lifetime of ^{15}N*(5.27) is ≈ 1 psec (1969NI09): see Table 15.7 (in PDF or PS) and (1967BI11). See also (1963HO1E).
See (1967PO13). See also (1969BR1D).
Angular distributions of the transition to the ground state of ^{15}N have been measured for E(^{14}N)(cm) = 5.5 to 16 MeV (1961TO07, 1964JO1A, 1965BE1B, 1965HI1A). See also (1961TO01). Below ≈ 6.5 MeV, the tunneling theory of neutron transfer gives a good account of the data. At higher energies, nuclear absorption of the incident ^{14}N ions occur (1965HI1A, 1966GA04). See also (1968GA03). For reviews of the work on this reaction, see (1964FL1D, 1967DA1E, 1967VO1A, 1969BR1D). For discussions of relevant theories, see (1962BR1G, 1963BR1G, 1964BR1M, 1964GR1G, 1965BR1F, 1966BU1B, 1967BR1M, 1967BR1Q, 1967PE1D, 1968MA2G, 1968NA1F, 1969KA1G).
See (1968GA03).
The β^{} decay takes place to ^{15}N*(0, 5.30, 7.30, 8.31, 9.05): see Table 15.2 (in PDF or PS). Measurements of γray energies give E_{γ} = 5299.03 ± 0.43 keV (1967CH19), 8315 ± 6 and 9048 ± 4 keV (1966AL12). See also ^{15}C.
See (1967ZH1A, 1968YA1E, 1969ZH1A).
The integrated cross section for transitions to ^{14}C(0) for E_{γ} up to 30.5 MeV = 22 ± 3 MeV · mb, assuming an isotropic angular distribution. Pronounced maxima are observed at E_{γ} = 19.5, 20.4, 22.7 and 24.5 MeV. In addition a "pigmy" resonance at E_{γ} = 15.2 MeV and less pronounced structures at E_{γ} = 13.6 and 17.0 MeV are also observed (1964KO10). See also (1963FI04) and (1967ZH1A, 1968YA1E, 1969UB1C, 1969ZH1A).
Using the harmonic oscillator function, analysis of the scattering of 250 and 400 MeV electrons gives, respectively, r_{rms} = 2.68 ± 0.05 fm and 2.63 ± 0.05 fm for ^{15}N (1968DA1Q). At E_{e} = 50  57 MeV, excitation of ^{15}N*(6.32) gives Γ^{0}_{γ}(M1) = 3.4 ± 0.7 eV and Γ^{0}_{γ}(E2) = 0.06 ± 0.02 eV: δ(E2/M1) = 0.13 ± 0.03 (1968BE14).
See ^{16}N.
The angular distribution of elastically scattered protons has been measured at E_{p} = 39.8 MeV (1969SN04). See also (1963NA1C).
At E(^{3}He) = 39.8 MeV, a number of inelastically scattered ^{3}He groups are observed corresponding to states in ^{15}N: see Table 15.17 (in PDF or PS). Angular distributions were obtained for a number of these, and were analyzed using a local twobody interaction with an arbitrary spinisospin exchange mixture (1969BA06). See also (1968BA1E). (1969BO13) measured the angular distribution of elastically scattered ^{3}He particles at E(^{3}He) = 11 MeV.
The surface thickness a = 0.36 fm, as determined from analysis of the scattering of 44 MeV αparticles from ^{15}N (1968FA1A). At E_{α} = 40.5 MeV, a number of particle groups have been observed, and angular distributions have been measured: see Table 15.17 (in PDF or PS) (1966HA19). See also (1965BU05), B(E2)↓/e^{2} = 4.9 fm^{4} for ^{15}N*(6.32): B(E2)↓/e^{2} = 60 fm^{6} for both ^{15}N*(5.27, 7.57) (1966HA19). See also (1969BA06).
See ^{15}O.
Over the giant resonance region in ^{16}O, the decay takes place to the odd parity states of ^{15}N at E_{x} = 0 and 6.32 MeV as well as to both of the even parity states at E_{x} = 5.27 and 5.30 MeV. The branching ratios are functions of the excitation energy in ^{16}O and of the authors: see (1965DE24, 1965MA45, 1965MO13, 1966KO1G, 1966OW01, 1967CA1C, 1967CA1P, 1968BA2L, 1969MU07, 1969SH02). The results are in fair agreement with the predictions of the singleparticle, singlehole theory of photoexcitation of ^{16}O, although some nonsingleparticle excitation appears to be necessary in some portions of the ^{16}O giant resonance: see, e.g. (1968BA2L). Highenergy γrays have also reported from the decay of ^{15}N*(7.30, 8.31, 9.05, 9.23) (1968BA2L, 1969HO1T, 1969MU07). See also the review in (1968SC1B), (1957JO20, 1959BR69, 1963SC32, 1968TU02, 1969FR20, 1969UL01) and (1968ZH1B; theor.). The τ_{m} of ^{15}N*(5.27) ≫ 0.1 psec; τ_{m} for ^{15}N*(6.33, 9.23) < 0.1 psec (1969MU07): see also Table 15.7 (in PDF or PS). For reaction (b), see (1962DO1A).
Angular distribution of the deuterons corresponding to the ground state of ^{15}N have been determined at E_{n} = 14.4 MeV (1964PA11, 1965VA05) and at 14 MeV (1963GA10). See also (1965DI1E; theor.).
At E_{p} = 460 MeV, the summed proton spectrum shows two peaks corresponding to the knowckout of p_{1/2} and p_{3/2} protons with binding energies of 12.4 and 19.0 MeV, respectively [^{15}N*(0, 6.32)] (1966TY01). See also the discussions in (1963CL1B, 1963RI1B), (1962FO03, 1967FU1A), (1963BE1A, 1963BE42; theor.) and (1959AJ76).
Angular distributions of the ^{3}He groups have been measured at E_{d} = 20 MeV (1969PU04: to ^{15}N*(0, 5.27, 5.30)), 28 MeV (1968GA13: to ^{15}N(0)), 34.4 MeV (1967HI06: to ^{15}N*(0, 5.27 + 5.30, 6.32)), 52 MeV (1969KA1A, 1969KA1W: to ^{15}N(0)), and 82 MeV (1969DO04: to ^{15}N*(0, 5.27 + 5.30, 6.32)) and analyzed by DWBA. The ^{3}He group to ^{15}N*(5.2) does not show a stripping pattern (1969PU04). See also (1968BA2J; theor.).
Angular distributions have been measured at E_{t} = 0.9 to 1.7 MeV (1967KO1G; α_{0}), 1.15 to 1.95 MeV (1959JO32; α_{0}), 1.5 to 3.0 MeV (1966SE1D; α_{0}), and 13 MeV (1965AJ01; α_{0}, α_{1+2}, α_{3}). A γray with E_{γ} = 5.272 ± 0.010 MeV has been observed in this reaction: see Table 15.7 (in PDF or PS) (1965AL19). See also (1959AJ76).
See (1954PA39).
Angular distributions of ground state αparticles are reported at E_{p} = 0.84 to 2.00 MeV (1961CA02) and at 7.9, 10.6 and 13.3 MeV (1964EC03). Angular correlation measurements lead to J = 5/2, 3/2, (1/2), (3/2) for ^{15}N*(5.28, 6.32, 8.31, 8.58) (1965WA06), J = 5/2, 5/2, 3/2, 7/2 for ^{15}N*(5.28, 7.16, 7.30, 7.57) (1966HA30), J = 3/2 for ^{15}N*(6.32) (1966LO02). The M2/E1 mixing ratio of the 7.30 → g.s. transition indicates an unusually large retardation of an E1 transition in a nonselfconjugate nucleus (1966HA30). J = 5/2 for ^{15}N*(5.27) and the mixing parameter fix J = 5/2 for ^{15}N*(10.54) which fed the first excited state of ^{15}N (1959HE1D) in the ^{14}C(p, γ)^{15}N reaction (1965WA06). See also (1960CL02, 1961LO10, 1964AM1A, 1964MA25, 1964MA57, 1964SC01), (1959AJ76) and ^{19}F in (1959AJ76, 1972AJ02).
See (1965HA1G).
For reaction (a) see (1962FO03). For reaction (b) see (1963LA02).
Angular distributions of the ^{6}Li ions corresponding to ^{15}N(0) have been measured at E_{d} = 9.0 to 12.5 MeV (1967DE14), 14.5 MeV (1964DA1B), 14.9 MeV (1966DE09) and 21 MeV (1965SL1C). Attempts have been made to fit the data with DWBA: see references above and (1963DR1B). See also (1964BL1C).
See (1965WI1A).
