1. Collectivity of the 2p-2h proton intruder band of $^{116}$Sn
- Author
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Petrache, C.M., Régis, J.M., Andreoiu, C., Spieker, M., Michelagnoli, C., Garrett, P.E., Astier, A., Dupont, E., Garcia, F., Guo, S., Häfner, G., Jolie, J., Kandzia, F., Karayonchev, V., Kim, Y.H., Knafla, L., Köster, U., Lv, B.F., Marginean, N., Mihai, C., Mutti, P., Ortner, K., Porzio, C., Prill, S., Saed-Samii, N., Urban, W., Vanhoy, J.R., Whitmore, K., Wisniewski, J., Yates, S.W., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), and ILL
- Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Structure - Abstract
International audience; 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.
- Published
- 2019
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