Measurement of key resonance states for the 30P(p, γ)31Sreaction rate, and the production of intermediate-mass elements in nova explosions

Kankainen, A, Woods, PJ, Schatz, H, Poxon-Pearson, T, Doherty, Daniel, Bader, V, Baugher, T, Bazin, D, Brown, BA, Browne, J et al, Estrade, A, Gade, A, José, J, Kontos, A, Langer, C, Lotay, Gavin, Meisel, Z, Montes, F, Noji, S, Nunes, F, Perdikakis, G, Pereira, J, Recchia, F, Redpath, T, Stroberg, R, Scott, M, Seweryniak, D, Stevens, J, Weisshaar, D and Zegers, R (2017) Measurement of key resonance states for the 30P(p, γ)31Sreaction rate, and the production of intermediate-mass elements in nova explosions Physics Letters B.

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Abstract

We report the first experimental constraints on spectroscopic factors and strengths of key resonances in the 30P(p, γ)31Sreaction critical for determining the production of intermediate-mass elements up to Ca in nova ejecta. The 30P(d, n)31Sreaction 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≈0.10–0.17GK, 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.

Item Type:	Article
Subjects :	Physics
Divisions :	Faculty of Engineering and Physical Sciences > Physics
Authors :	Name Email ORCID Kankainen, A UNSPECIFIED UNSPECIFIED Woods, PJ UNSPECIFIED UNSPECIFIED Schatz, H UNSPECIFIED UNSPECIFIED Poxon-Pearson, T UNSPECIFIED UNSPECIFIED Doherty, Daniel d.t.doherty@surrey.ac.uk UNSPECIFIED Bader, V UNSPECIFIED UNSPECIFIED Baugher, T UNSPECIFIED UNSPECIFIED Bazin, D UNSPECIFIED UNSPECIFIED Brown, BA UNSPECIFIED UNSPECIFIED Browne, J UNSPECIFIED UNSPECIFIED Estrade, A UNSPECIFIED UNSPECIFIED Gade, A UNSPECIFIED UNSPECIFIED José, J UNSPECIFIED UNSPECIFIED Kontos, A UNSPECIFIED UNSPECIFIED Langer, C UNSPECIFIED UNSPECIFIED Lotay, Gavin g.lotay@surrey.ac.uk UNSPECIFIED Meisel, Z UNSPECIFIED UNSPECIFIED Montes, F UNSPECIFIED UNSPECIFIED Noji, S UNSPECIFIED UNSPECIFIED Nunes, F UNSPECIFIED UNSPECIFIED Perdikakis, G UNSPECIFIED UNSPECIFIED Pereira, J UNSPECIFIED UNSPECIFIED Recchia, F UNSPECIFIED UNSPECIFIED Redpath, T UNSPECIFIED UNSPECIFIED Stroberg, R UNSPECIFIED UNSPECIFIED Scott, M UNSPECIFIED UNSPECIFIED Seweryniak, D UNSPECIFIED UNSPECIFIED Stevens, J UNSPECIFIED UNSPECIFIED Weisshaar, D UNSPECIFIED UNSPECIFIED Zegers, R UNSPECIFIED UNSPECIFIED
Date :	16 February 2017
Identification Number :	10.1016/j.physletb.2017.01.084
Copyright Disclaimer :	©2017 Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Depositing User :	Symplectic Elements
Date Deposited :	03 Mar 2017 11:30
Last Modified :	19 Jul 2017 11:40
URI:	http://epubs.surrey.ac.uk/id/eprint/813682

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