
^{15}C (1981AJ01)(See Energy Level Diagrams for ^{15}C) GENERAL: See also (1976AJ04) and Table 15.1 [Table of Energy Levels] (in PDF or PS) here. Model calculations:(1976LI16). Special levels:(1976LI16). Astrophysical questions:(1977LI1H, 1978SN1A). Special reactions involing ^{15}C:(1975FE1A, 1975KO1J, 1977AR06, 1978GE1C, 1978HE1C, 1978KO01, 1979AL22). Muon and neutrino capture and reactions:(1977BA1P). Pion capture and reactions:(1977BA24). Other topics:(1976LI16, 1978DA1A, 1979BE1H).
The halflife of ^{15}C is 2.449 ± 0.005 sec (1979AL23). Transitions have been observed to ^{15}N_{g.s.} and to the upper of the 5.3 MeV states in ^{15}N which has J^{π} = 1/2^{+}. Therefore J^{π}(^{15}C_{g.s.}) = 1/2^{+} or 3/2^{+}. Weak transitions are observed to ^{15}N*(7.30, 8.31, 8.57, 9.05) (1979AL23): see Table 15.16 (in PDF or PS). See also (1976AJ04) and (1977RI08, 1979AL23; theor.).
Observed proton groups are displayed in Table 15.2 (in PDF or PS). Angular distributions have been reported for E(^{7}Li) = 1.7 to 20 MeV: see (1976AJ04).
g = 0.703 ± 0.012 for ^{15}C*(0.74) (1980AS01). See also (1976AL16, 1979AL23).
At E_{α} = 65 MeV ^{15}C*(0.74, 6.74, 7.35) are strongly populated. The angular distribution to ^{15}C*(6.74 + 7.35) is consistent with L = 4 leading to J^{π} = 7/2^{} and 9/2^{} for these two states on the basis of the (2J + 1) "rule" (1978JA10). See also (1976CE1E, 1976JA13). [However see Table 15.1 (in PDF or PS) for the density of states, and compare with the resolution of (1978JA10).]
σ_{γ} < 1 μb (1973MU14). See also (1976AJ04).
Observed proton groups are displayed in Table 15.2 (in PDF or PS). See also (1976AJ04).
See ^{16}N in (1977AJ02).
See (1976AJ04).
