TY - JOUR
T1 - Measurement of key resonance states for the P30(p,γ)S31 reaction rate, and the production of intermediate-mass elements in nova explosions
AU - Kankainen, A.
AU - Woods, P. J.
AU - Schatz, H.
AU - Poxon-Pearson, T.
AU - Doherty, D. T.
AU - Bader, V.
AU - Baugher, T.
AU - Bazin, D.
AU - Brown, B. A.
AU - Browne, J.
AU - Estrade, A.
AU - Gade, A.
AU - José, J.
AU - Kontos, A.
AU - Langer, C.
AU - Lotay, G.
AU - Meisel, Z.
AU - Montes, F.
AU - Noji, S.
AU - Nunes, F.
AU - Perdikakis, G.
AU - Pereira, J.
AU - Recchia, F.
AU - Redpath, T.
AU - Stroberg, R.
AU - Scott, M.
AU - Seweryniak, D.
AU - Stevens, J.
AU - Weisshaar, D.
AU - Wimmer, K.
AU - Zegers, R.
N1 - Publisher Copyright:
© 2017 The Authors
PY - 2017/6/10
Y1 - 2017/6/10
N2 - We report the first experimental constraints on spectroscopic factors and strengths of key resonances in the P30(p,γ)S31 reaction critical for determining the production of intermediate-mass elements up to Ca in nova ejecta. The P30(d,n)S31 reaction was studied in inverse kinematics using the GRETINA γ-ray array to measure the angle-integrated cross-sections of states above the proton threshold. In general, negative-parity states are found to be most strongly produced but the absolute values of spectroscopic factors are typically an order of magnitude lower than predicted by the shell-model calculations employing WBP Hamiltonian for the negative-parity states. The results clearly indicate the dominance of a single 3/2− resonance state at 196 keV in the region of nova burning T≈0.10–0.17 GK, well within the region of interest for nova nucleosynthesis. Hydrodynamic simulations of nova explosions have been performed to demonstrate the effect on the composition of nova ejecta.
AB - We report the first experimental constraints on spectroscopic factors and strengths of key resonances in the P30(p,γ)S31 reaction critical for determining the production of intermediate-mass elements up to Ca in nova ejecta. The P30(d,n)S31 reaction was studied in inverse kinematics using the GRETINA γ-ray array to measure the angle-integrated cross-sections of states above the proton threshold. In general, negative-parity states are found to be most strongly produced but the absolute values of spectroscopic factors are typically an order of magnitude lower than predicted by the shell-model calculations employing WBP Hamiltonian for the negative-parity states. The results clearly indicate the dominance of a single 3/2− resonance state at 196 keV in the region of nova burning T≈0.10–0.17 GK, well within the region of interest for nova nucleosynthesis. Hydrodynamic simulations of nova explosions have been performed to demonstrate the effect on the composition of nova ejecta.
UR - http://www.scopus.com/inward/record.url?scp=85018796186&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2017.01.084
DO - 10.1016/j.physletb.2017.01.084
M3 - Article
AN - SCOPUS:85018796186
SN - 0370-2693
VL - 769
SP - 549
EP - 553
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -