Autor: |
Rudolph, D, Ragnarsson, I, Andreoiu, C, Bentley, MA, Carpenter, MP, Charity, RJ, Clark, RM, Ekman, J, Fahlander, C, Fallon, P, Reviol, W, Sarantites, DG, Seweryniak, D |
Rok vydání: |
2020 |
Předmět: |
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Zdroj: |
Physical Review C, vol 102, iss 1 |
Popis: |
The fusion-evaporation reaction S32+Si28 at 125 MeV beam energy was used to populate high-spin states in the semimagic N=28 nuclei Mn53 and Fe54. With a combination of the Gammasphere spectrometer and ancillary devices including the Microball CsI(Tl) array, extensive high-spin level schemes are derived. They exhibit rotational-like collective structures and competing single-particle excitations. The experimental results are compared with predictions from shell-model calculations, for which the inclusion of isopin-symmetry-breaking terms is found to improve the description. An interpretation of the high-spin states is put forward using cranked Nilsson-Strutinsky calculations, indicative of contributions from collective excitations beyond some 8-MeV excitation energy and highlighting the importance of the g9/2 intruder orbital in this energy range. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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