Level structure of the Tz=-1 nucleus Ar 34 and its relevance for nucleosynthesis in ONe novae

Authors

A. R.L. Kennington, University of Surrey
G. Lotay, University of Surrey
D. T. Doherty, University of Surrey
D. Seweryniak, Argonne National Laboratory
C. Andreoiu, Simon Fraser University
K. Auranen, Argonne National Laboratory
M. P. Carpenter, Argonne National Laboratory
W. N. Catford, University of Surrey
C. M. Deibel, Louisiana State University
K. Hadyńska-Klk, University of Surrey
S. Hallam, University of Surrey
D. Hoff, University of Massachusetts Lowell
T. Huang, Argonne National Laboratory
R. V.F. Janssens, The University of North Carolina at Chapel Hill
S. Jazrawi, University of Surrey
J. José, Universitat Politècnica de Catalunya
F. G. Kondev, Argonne National Laboratory
T. Lauritsen, Argonne National Laboratory
J. Li, Argonne National Laboratory
A. M. Rogers, University of Massachusetts Lowell
J. Saiz, University of York
G. Savard, Argonne National Laboratory
S. Stolze, Argonne National Laboratory
G. L. Wilson, Argonne National Laboratory
S. Zhu, Argonne National Laboratory

Document Type

Article

Publication Date

3-1-2021

Abstract

The Mg24+C12 fusion reaction was used to perform a detailed γ-ray spectroscopy study of the astrophysically important nucleus Ar34. In particular, an experimental setup, coupling the advanced γ-ray tracking array GRETINA with the well-established Argonne fragment mass analyzer (FMA), was employed to obtain excitation energies and spin-parity assignments for excited states in Ar34, both above and below the proton separation energy. For the first time, an angular distribution analysis of in-beam γ rays from fusion-evaporation reactions, using a tracking array, has been performed and Coulomb energy differences of analog states in the T=1, A=34 mirror system, explored from 0 to 6 MeV. Furthermore, we present a comprehensive discussion of the astrophysical Cl33(p,γ) stellar reaction rate, together with implications for the identification of nova presolar grains from sulfur isotopic abundances.

Publication Source (Journal or Book title)

Physical Review C

Recommended Citation

Kennington, A., Lotay, G., Doherty, D., Seweryniak, D., Andreoiu, C., Auranen, K., Carpenter, M., Catford, W., Deibel, C., Hadyńska-Klk, K., Hallam, S., Hoff, D., Huang, T., Janssens, R., Jazrawi, S., José, J., Kondev, F., Lauritsen, T., Li, J., Rogers, A., Saiz, J., Savard, G., Stolze, S., Wilson, G., & Zhu, S. (2021). Level structure of the Tz=-1 nucleus Ar 34 and its relevance for nucleosynthesis in ONe novae. Physical Review C, 103 (3) https://doi.org/10.1103/PhysRevC.103.035805