Collectivity of the 2p-2h proton intruder band of Sn 116

C. M. Petrache, J. M. Régis, C. Andreoiu, M. Spieker, C. Michelagnoli, P. E. Garrett, A. Astier, E. Dupont, F. Garcia, S. Guo, G. Häfner, J. Jolie, F. Kandzia, V. Karayonchev, Y. H. Kim, L. Knafla, U. Köster, B. F. Lv, N. Marginean, C. MihaiP. Mutti, K. Ortner, C. Porzio, S. Prill, N. Saed-Samii, W. Urban, J. R. Vanhoy, K. Whitmore, J. Wisniewski, S. W. Yates

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16 Scopus citations

Abstract

The half-life of the 42+ state of the 2p-2h proton intruder band of Sn116 has been measured with the fast-timing technique. The lifetime of T1/2=29(10) ps leads to a transition probability BE2;42+→22+=40(13) Weisskopf units, which is in very good agreement with the large BE2;22+→03+ value measured previously and provides strong support for the 03+ state as the bandhead of the intruder configuration and for the shape coexistence in the semimagic Sn116 nucleus. IBM-2 calculations with mixing reproduce the experimental data very well, giving insight into the degree of mixing between the different states.

Original languageEnglish
Article number024303
JournalPhysical Review C
Volume99
Issue number2
DOIs
StatePublished - Feb 4 2019

Bibliographical note

Publisher Copyright:
© 2019 American Physical Society.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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