Core-proton coupled nature of the 11/2+state in 131Sb probed by lifetime measurements

Articolo

Data di Pubblicazione:

2023

Citazione:

Core-proton coupled nature of the 11/2+state in 131Sb probed by lifetime measurements / S. Bottoni, E.R. Gamba, G. De Gregorio, A. Gargano, S. Leoni, B. Fornal, N. Brancadori, G. Ciconali, F.C.L. Crespi, N. Cieplicka-Orynczak, L.W. Iskra, G. Colombi, Y.H. Kim, U. Koster, C. Michelagnoli, F. Dunkel, A. Esmaylzadeh, L. Gerhard, J. Jolie, L. Knafla, M. Ley, J.-. Regis, K. Schomaker, M. Sferrazza. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 2453:1(2023), pp. 012028.1-012028.6. (Intervento presentato al 13. convegno ISS International Spring Seminar on Nuclear Physics: Perspectives and Challenges in Nuclear Structure after 70 Years of Shell Model : 15 through 20 May tenutosi a Sant'Angelo nel 2022) [10.1088/1742-6596/2453/1/012028].

Abstract:

The structure of the 11/21+ state in 131Sb was investigated at the LOHENGRIN spectrometer of Institut Laue-Langevin via neutron-induced fission of 235U and lifetime measurements, yielding T1/2=3(2), at the edge of the sensitivity of the experimental method. This first result for the 11/21+ state half-life in neutron-rich Sb isotopes provides a quadrupole reduced transition probability to the ground state of B(E2)=1.4-0.6+1.5 W.u., very close to the B(E2;21+?01+) in 130Sn. Realistic shell-model calculations reproduce well both the experimental level scheme of 131Sb and the B(E2;11/21+?7/21+) value, indicting a dominant 2+(130Sn) -pg7/2 core-proton coupled configuration for the 11/21+ state.

Tipologia IRIS:

01 - Articolo su periodico

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