Collective states and shape competition in 126Te

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 60-68
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1137/41/4/044003

摘要

High-spin states in 126Te have been investigated by using in-beam γray spectroscopy with the 124Sn(7Li,1p4n)126Te reaction at a beam energy of 48 MeV.The previously known level scheme has been enriched,and a new negative-parity sequence has been established.The yrast positive-parity band shows a shape change between triaxial shape and collective oblate shape as a function of spin.In particular,three competitive minima appear in the potential energy surface for the Iπ =8+ states,with one aligned state at γ =-120° and two triaxial states at γ ～ 30° and-45°,respectively.The signature splitting behavior of the negative-parity band is discussed.The shape change with increasing angular momentum and the signature splitting can be interpreted well in terms of the Cranked Nilsson-Strutinsky-Bogoliubov and Cranked Nilsson-Strutinsky model calculations.