Energy Levels of Light Nuclei A = 14 - Triangle Universities Nuclear ...

a See references in Tables 14.16 in (70AJ04), 14.20 in (76AJ04) and 14.16 in
(81AJ01).
b See (86AD01).
c See (81BI17): E x = 9172.5 ± 0.3 keV from γ-ray measurements. See also Table
14.10, Γ 0 /Γ =(79± 4)%; Γ 0 (from reaction 41 and Table 14.19)= 7.2 ± 0.4 eV;
Γ c:m: from 13 C(p, p).
d Reduced width for proton emission is of the order of 1% of the Wigner limit. For
recent work on the E p =3.11 MeV resonance see (90WIZV; prelim.).
e (86ZI08); Γ 0 =(11.0 ± 1.7) × 10 ,3 eV: see Table 14.11. See also (85PR03).
f Weak resonance.
g In the γ 3:09 channel the peak occurs 55 keV higher: interference effects may be
present.
h Part of the giant dipole resonance.
i Some broad structures appear in the γ 0 , γ 3:68 and γ 3:85 yields. See also reaction
26 and reaction 25 in (86AJ01).
j See also (86WA13) and Table 14.14.
k Γ =1.2 ± 0.4 keV;Γ p =0.5% of single-particle unit. J based on angular
distribution of γ 0 . For nature of γ-decay see Table 14.11.
l (2J +1)Γ =(18.5 ± 4.2)Γ/Γ p eV; if J =1,Γ ≥ 6eV.
m (2J +1)Γ 0 =2.3 Γ/Γ p eV,ifΓ=38eVisassumed.
n (2J +1)Γ 0 ≥ 200 eV: thus the transition is dipole and T = 1. The resonance is
asymmetric and it is suggested that two states are involved, one with J =1 , at
E x =12.7 MeV and the other one with 2 , at E x =13.3 MeV.
o (85PR03).
p (90SP02).
23. 12 C( 12 C. 10 B) 14 N Q m = −14.9144
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. Angular distributions are reported at E( 12 C) = 49.0 to 93.8 MeV: see (81AJ01, 86AJ01).
24. 12 C( 13 C, 11 B) 14 N Q m = −8.4066
At E( 13 C) = 390 MeV angular distributions have been studied to 14 N*(0, 2.31, 5.8[u]) and to
unresolved structures and continua. The spectra are dominated by the group to 14 N*(5.8) (87AD07,
88VO08). See also (89VO1D).
25. (a) 13 C(p,γ) 14 N Q m =7.55063
(b) 13 C(p, p ′ γ) 13 C E b =7.55063
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