论文信息 - Shell-model studies of the astrophysical rp-process reactions 34S(p,γ)35Cl and 34 g,m Cl(p,γ)35Ar

Shell-model studies of the astrophysical rp-process reactions 34S(p,γ)35Cl and 34 g,m Cl(p,γ)35Ar

The two rp-reactions 34S(p,γ)35Cl and 34 g,m Cl(p,γ)35Ar 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 34S(3He,d)35Cl reaction. The thermonuclear 34 g,m Cl(p,γ)35Ar reaction rates are unknown because of a lack of experimental data. The rates for transitions from the ground state of 34Cl as well as from the isomeric first excited state of 34Cl are explicitly calculated taking into account the relative populations of the two states.

[1] R. Longland,et al. Experimental study of Cl35 excited states via S32(α,p) , 2019, Physical Review C.

[2] R. Longland,et al. A study of $^{35}$Cl excited states via $^{32}$S($\alpha, p$). , 2019, 1905.08774.

[3] W. Hager,et al. and s , 2019, Shallow Water Hydraulics.

[4] R. Reifarth,et al. Treatment of isomers in nucleosynthesis codes , 2018, 1803.08335.

[5] R. Hertenberger,et al. First measurement of the S-34(p,gamma)Cl-35 reaction rate through indirect methods for presolar nova grains , 2017 .

[6] B. A. Brown,et al. The Shell-Model Code NuShellX@MSU , 2014 .

[7] J. Truran,et al. MESA and NuGrid simulations of classical novae: CO and ONe nova nucleosynthesis , 2013, 1303.6265.

[8] B. A. Brown,et al. Shape transitions in exotic Si and S isotopes and tensor-force-driven Jahn-Teller effect , 2012, 1210.5469.

[9] R. Longland,et al. Charged-Particle Thermonuclear Reaction Rates: I. Monte Carlo Method and Statistical Distributions , 2010, 1004.4136.

[10] B. A. Brown,et al. Revised result for the 32 Cl(p,γ) 33 Ar reaction rate for astrophysical rp-process calculations , 2005, nucl-ex/0511040.

[11] W. J. Thompson,et al. Proton-induced Thermonuclear Reaction Rates for A = 20–40 Nuclei , 2001 .

[12] A. Hashizume,et al. Nuclear data sheets for A = 120 , 1987 .

[13] D. H. Gloeckner,et al. Spurious center-of-mass motion , 1974 .