Coulomb excitation and structure of the rotational bands in ²³¹Pa

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• 作者：Wü ; rkner ; M. ; de Boer ; J. ; Levon ; A.I. ; Loewe ; M. ; Kvasil ; J. ; Srebrny ; J. ; Napiorkowski ; P.J. ; et. al.
• 关键词：25.70.De ; 29.30.Kv ; 27.90.+b ; 23.20.Lv ; 23.20.Js ; 21.60.Ev ; Nuclear reactions ; ²³¹Pa(³²S ; ³²S&prime ; ) ; E=148 MeV ; ²³¹Pa(⁵⁸Ni ; ⁵⁸Ni&prime ; ) ; E=255 ; 260 ; 261 MeV ; m
• 刊名：Nuclear Physics A
• 出版年：2003
• 期刊代码：44_03759474
• 类别：ph
• 出版时间：September 22, 2003
• 卷：725
• 期：Complete
• 页码：3-42
• 文件大小：551 K

摘要

The level structure of ²³¹Pa was investigated by Coulomb excitation using 148 MeV ³²S and 255, 260 and 261 MeV ⁵⁸Ni projectiles and the NORDBALL detector array. The 1/2[530] ground-state rotational band was excited up to spin 39/2⁻. The 3/2[651] band, established up to spin 37/2⁺, was observed to be populated apart from direct Coulomb excitation by the de-excitation of the 1/2[530] band. The 1/2[400] band could be followed up to spin 23/2⁺. Weak excitation of the bands 5/2[642], 5/2[512], 3/2[532] and 3/2[521] was seen up to spins 11/2⁺, 15/2⁻, 9/2⁻ and 9/2⁻, respectively. Matrix elements were extracted from the γ-ray yields with the help of the semi-classical Coulomb-excitation least-squares search code GOSIA. The level scheme and transition intensities were analyzed in the framework of the quasiparticle-plus-phonon model including Coriolis-coupling (QPMC).