Phys.Rev. C 103, 035805 (2021)

A.R.L.Kennington, G.Lotay, D.T.Doherty, D.Seweryniak, C.Andreoiu, K.Auranen, M.P.Carpenter, W.N.Catford, C.M.Deibel, K.Hadynska-Klek, S.Hallam, D.Hoff, T.Huang, R.V.F.Janssens, S.Jazrawi, J.Jose, F.G.Kondev, T.Lauritsen, J.Li, A.M.Rogers, J.Saiz, G.Savard, S.Stolze, G.L.Wilson, S.Zhu

Level structure of the T_z = -1 nucleus ³⁴Ar and its relevance for nucleosynthesis in ONe novae

NUCLEAR REACTIONS ¹²C(²⁴Mg, 2n)³⁴Ar, (²⁴Mg, 2p)³⁴S, E=95 MeV; measured reaction products, Eγ, Iγ, (³⁴Ar)γ- and (³⁴S)γ-coin, γγ-coin, γ(θ) using GRETINA array for detection of high-energy γ rays, and Fragment mass analyzer (FMA) for recoils at ATLAS-ANL facility. ³⁴Ar, ³⁴S; deduced levels, proton-unbound levels of astrophysical significance, J, π, mirror symmetry, ³³S/³²S and ³⁴S/³²S ratios to search for nova presolar grains, and compared with previous experimental data. ³⁴Cl(p, γ), T=0.1-0.8 GK; calculated stellar reaction rate. Comparison of levels structures in ³⁴Ar and ³⁴S with data from the ENSDF database, and with shell-model calculations using USDA Hamiltonian, within the sd shell-model space for even-parity states, and using WBP Hamiltonian, within the sd-pf space for odd-parity levels.

doi: 10.1103/PhysRevC.103.035805