Eur. Phys. J. A (2008) 36: 21-29
https://doi.org/10.1140/epja/i2008-10570-1

Regular Article - Experimental Physics

Transition to non-collective states at high spin in ¹²⁴Xe

¹ Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nußallee 14-16, D-53115, Bonn, Germany
² Niels Bohr Institute, Blegdamsvej 17, DK-2100, Copenhagen, Denmark
³ Dipartimento di Fisica, Università di Milano and INFN, I-20133, Milano, Italy
⁴ INFN, Sezione di Milano, I-20133, Milano, Italy
⁵ Lawrence Berkeley National Laboratory, 94720, Berkeley, CA, USA
⁶ Argonne National Laboratory, 60439, Argonne, IL, USA
⁷ Yale University, New Haven, CT, USA
⁸ Indian Institute of Technology, IN-721302, Kharagpur, India
⁹ Lund Institute of Technology, Lund, Sweden

Received: 21 February 2008
Accepted: 2 April 2008
Published online: 23 April 2008

Abstract

Excited states in ¹²⁴Xe were populated in the reaction ⁸²Se(⁴⁸Ca, 6n)¹²⁴Xe and γ -ray coincidence relationships were measured with the Gammasphere spectrometer. Two new bands are observed and several of the previously known bands are extended in the high- as well as in the low-spin region. Two irregular high-spin structures are also added. The irregularities are a fingerprint of a transition from collective to non-collective behaviour. Configuration assignments to the new structures are proposed on the basis of systematics and by comparing experimental properties with calculations within the framework of the cranking model.