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Level structure of S-31: From low excitation energies to the region of interest for hydrogen burning in novae through the P-30(p,gamma)S-31 reaction

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Original languageEnglish
JournalPhysical Review C
Issue number4
Publication statusPublished - 23 Apr 2014


Comprehensive measurements of the excitation energy and spin-parity assignments for states in S-31 are presented, from the first excited state, up to energies relevant for the P-30(p,gamma)S-31 reaction in ONe novae. This reaction rate strongly influences heavy element abundances in novae ejecta. States in S-31 are paired with their P-31 analogues using gamma rays detected with the Gammasphere detector array following the Si-28(He-4, n) fusion-evaporation reaction. The evolution of mirror energy differences is explored and the results are compared with new shell-model calculations. The excellent agreement observed in this work between experimental data and shell-model calculations provides confidence in using computed estimates in situations where experimental data are unavailable.

ID: 16205554