Physics Letters B (Jun 2017)
Measurement of key resonance states for the P30(p,γ)S31 reaction rate, and the production of intermediate-mass elements in nova explosions
- A. Kankainen,
- P.J. Woods,
- H. Schatz,
- T. Poxon-Pearson,
- D.T. Doherty,
- V. Bader,
- T. Baugher,
- D. Bazin,
- B.A. Brown,
- J. Browne,
- A. Estrade,
- A. Gade,
- J. José,
- A. Kontos,
- C. Langer,
- G. Lotay,
- Z. Meisel,
- F. Montes,
- S. Noji,
- F. Nunes,
- G. Perdikakis,
- J. Pereira,
- F. Recchia,
- T. Redpath,
- R. Stroberg,
- M. Scott,
- D. Seweryniak,
- J. Stevens,
- D. Weisshaar,
- K. Wimmer,
- R. Zegers
Affiliations
- A. Kankainen
- University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
- P.J. Woods
- University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
- H. Schatz
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- T. Poxon-Pearson
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- D.T. Doherty
- University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
- V. Bader
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- T. Baugher
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- D. Bazin
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- B.A. Brown
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- J. Browne
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- A. Estrade
- University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
- A. Gade
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- J. José
- Departament de Física, EEBE, Universitat Politècnica de Catalunya, E-08019 Barcelona, Spain
- A. Kontos
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- C. Langer
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- G. Lotay
- University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
- Z. Meisel
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- F. Montes
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- S. Noji
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- F. Nunes
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- G. Perdikakis
- JINA Center for the Evolution of the Elements, Michigan State University, East Lansing, MI 48824, USA
- J. Pereira
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- F. Recchia
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- T. Redpath
- Central Michigan University, Mount Pleasant, MI 48859, USA
- R. Stroberg
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- M. Scott
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- D. Seweryniak
- Argonne National Laboratory, Argonne, IL 60439, USA
- J. Stevens
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- D. Weisshaar
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- K. Wimmer
- Central Michigan University, Mount Pleasant, MI 48859, USA
- R. Zegers
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
- DOI
- https://doi.org/10.1016/j.physletb.2017.01.084
- Journal volume & issue
-
Vol. 769,
no. C
pp. 549 – 553
Abstract
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.
