WIMMER, K.; ARICI, T.; KORTEN, W.; DOORNENBAL, P.; DELAROCHE, J.-P.; GIROD, M.; LIBERT, J.; RODRÍGUEZ, T.R.; AGUILERA, P.; ALGORA, A.; ANDO, T.; BABA, H.; BLANK, B.; BOSO, A.; CHEN, S.; CORSI, A.; DAVIES, P.; DE ANGELIS, G.; DE FRANCE, G.; DOHERTY, D.T.; GERL, J.; GERNHÄUSER, R.; GOIGOUX, T.; JENKINS, D.; KISS, G.; KOYAMA, S.; MOTOBAYASHI, T.; NAGAMINE, S.; NIIKURA, M.; NISHIMURA, S.; OBERTELLI, A.; LUBOS, D.; PHONG, V.H.; RUBIO, B.; SAHIN, E.; SAITO, T.Y.; SAKURAI, H.; SINCLAIR, L.; STEPPENBECK, D.; TANIUCHI, R.; VAQUERO, V.; WADSWORTH, R.; WU, J.; ZIELINSKA, M.

doi:10.1140/epja/s10050-020-00171-3

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WIMMER, K.

ARICI, T.

KORTEN, W.
Institut de Recherches sur les lois Fondamentales de l'Univers [IRFU]

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Eur.Phys.J.A. 2020, vol. 56, n° 6, p. 159

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The $N=Z=36$ nucleus $^{72}$Kr has been studied by inelastic scattering at intermediate energies. Two targets, $^{9}$Be and $^{197}$Au, were used to extract the nuclear deformation length, $\delta _\text {N}$, and the reduced E2 transition probability, B(E2). The previously unknown non-yrast $2^+$ and $4^+$ states as well as a new candidate for the octupole $3^-$ state have been observed in the scattering on the Be target and placed in the level scheme based on $\gamma -\gamma $ coincidences. The second $2^+$ state was also observed in the scattering on the Au target and the $B(E2;\;2^+_2 \rightarrow 0^+_1)$ value could be determined for the first time. Analyzing the results in terms of a two-band mixing model shows clear evidence for a oblate-prolate shape coexistence and can be explained by a shape change from an oblate ground state to prolate deformed yrast band from the first $2^+$ state. This interpretation is corroborated by beyond mean field calculations using the Gogny D1S interaction.< Réduire

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Shape coexistence revealed in the $N=Z$ isotope $^{72}$Kr through inelastic scattering

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