Shape coexistence and isospin symmetry in A=70 nuclei: Spectroscopy of the T_z = -1 nucleus ⁷⁰Kr

K. Wimmer , W. Korten , T. Arici , P. Doornenbal , P. Aguilera , A. Algora , T. Ando , H. Baba

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B. Blank A. Boso S. Chen A. Corsi P. Davies G. de Angelis G. de France D. Doherty J. Gerl R. Gernh\"auser D. Jenkins S. Koyama T. Motobayashi S. Nagamine M. Niikura A. Obertelli D. Lubos B. Rubio E. Sahin T. Saito H. Sakurai L. Sinclair D. Steppenbeck R. Taniuchi R. Wadsworth M. Zielinska

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classification ⚛️ nucl-ex

keywords nucleusbeamcoexistenceshapestateassignmentsbeencandidate

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Excited states in the $T_z=-1$ nucleus $^{70}$Kr have been populated using inelastic scattering of a radioactive $^{70}$Kr beam as well as one- and two-neutron removal reactions from $^{71,72}$Kr at intermediate beam energies. The level scheme of $^{70}$Kr was constructed from the observed $\gamma$-ray transitions and coincidences. Tentative spin and parity assignments were made based on comparison with the mirror nucleus $^{70}$Se. A second $2^+$ state and a candidate for the corresponding $4^+_2$ state suggest shape coexistence in $^{70}$Kr.

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Shape coexistence and isospin symmetry in A=70 nuclei: Spectroscopy of the T_z = -1 nucleus ⁷⁰Kr

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