Phys.Rev. C 97, 054613 (2018)

A.M.Long, T.Adachi, M.Beard, G.P.A.Berg, M.Couder, R.J.deBoer, M.Dozono, J.Gorres, H.Fujita, Y.Fujita, K.Hatanaka, D.Ishikawa, T.Kubo, H.Matsubara, Y.Namiki, S.O'Brien, Y.Ohkuma, H.Okamura, H.J.Ong, D.Patel, Y.Sakemi, Y.Shimbara, S.Suzuki, R.Talwar, A.Tamii, A.Volya, T.Wakasa, R.Watanabe, M.Wiescher, R.Yamada, J.Zenihiro

α-unbound levels in ³⁴Ar from ³⁶Ar(p, t)³⁴Ar reaction measurements and implications for the astrophysical ³⁰S (α, p)³³Cl reaction rate

NUCLEAR REACTIONS ³⁶Ar(p, t), E=100 MeV; measured triton spectra, σ(θ) using Grand Raiden spectrograph at RCNP, Osaka. ³⁴Ar; deduced levels, α-unbound states; calculated single proton widths, spin distributions for selected excitation energies, and α-spectroscopic factors using back-shifted Fermi gas (BSFG) model and shell model calculations. Comparison of ³⁴Ar levels in several previous experiments. ³⁰S(α, p)³³Cl, T₉=0.10-3.0; calculated astrophysical reaction rates at temperatures relevant to x-ray bursts (XRB) using a Monte Carlo approach within a narrow-resonance formalism. Comparison of reaction rates with two standard Hauser-Feshbach model predictions.

doi: 10.1103/PhysRevC.97.054613