Shape Coexistence at Zero Spin in
Phys Rev Lett
; 125(10): 102502, 2020 Sep 04.
Article
em En
| MEDLINE
| ID: mdl-32955302
ABSTRACT
The low-spin structure of the semimagic ^{64}Ni nucleus has been considerably expanded combining four experiments, several 0^{+} and 2^{+} excited states were identified below 4.5 MeV, and their properties established. The Monte Carlo shell model accounts for the results and unveils an unexpectedly complex landscape of coexisting shapes a prolate 0^{+} excitation is located at a surprisingly high energy (3463 keV), with a collective 2^{+} state 286 keV above it, the first such observation in Ni isotopes. The evolution in excitation energy of the prolate minimum across the neutron N=40 subshell gap highlights the impact of the monopole interaction and its variation in strength with N.
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01-internacional
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MEDLINE
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En
Ano de publicação:
2020
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Article