Open AccessShell-model studies of the astrophysical rp-process reactions 34S(p,γ)35Cl and 34 g,m Cl(p,γ)35Ar
Author(s) -
W. A. Richter,
B. Alex Brown,
R. Longland,
C. Wrede,
C. Fry,
P. A. Denisenkov,
Falk Herwig,
D. Kurtulgil,
M. Pignatari,
R. Reifarth
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1643/1/012064
Subject(s) - excited state , atomic physics , physics , proton , ground state , nuclear reaction , chemistry , nuclear physics
The two rp-reactions 34 S(p,γ) 35 Cl and 34 g,m Cl(p,γ) 35 Ar were studied via a shell-model approach. At energies in the resonance region near the proton-emission threshold many negative-parity states appear. We present results of calculations in a full (0+1)ℏω model space which addresses this problem. Energies, spectroscopic factors and proton-decay widths are calculated for input into the reaction rates. Comparisons are also made with a recent experimental determination of the reaction rate for the 34 S( 3 He,d) 35 Cl reaction. The thermonuclear 34 g,m Cl(p,γ) 35 Ar reaction rates are unknown because of a lack of experimental data. The rates for transitions from the ground state of 34 Cl as well as from the isomeric first excited state of 34 Cl are explicitly calculated taking into account the relative populations of the two states.