Measurement of key resonance states for the P30(p,γ)S31 reaction rate, and the production of intermediate-mass elements in nova explosions
Elsevier, 2017
Online
academicJournal
Zugriff:
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 3/2â resonance state at 196 keV in the region of nova burning Tâ0.10â0.17 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.
| Titel: |
Measurement of key resonance states for the P30(p,γ)S31 reaction rate, and the production of intermediate-mass elements in nova explosions
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| Autor/in / Beteiligte Person: | Kankainen, A. ; Woods, P.J. ; Schatz, H. ; Poxon-Pearson, T. ; Doherty, D.T. ; Bader, V. ; Baugher, T. ; Bazin, D. ; Brown, B.A. ; Browne, J. ; Estrade, A. ; Gade, A. ; José, J. ; Kontos, A. ; Langer, C. ; Lotay, G. ; Meisel, Z. ; Montes, F. ; Noji, S. ; Nunes, F. ; Perdikakis, G. ; Pereira, J. ; Recchia, F. ; Redpath, T. ; Stroberg, R. ; Scott, M. |
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| Veröffentlichung: | Elsevier, 2017 |
| Medientyp: | academicJournal |
| DOI: | 10.1016/j.physletb.2017.01.084 |
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