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Journal Articles Nuclear Physics A Year : 1996

Level structures of $^{131,129}$Ce observed in beta decay


The low-lying levels of the odd-mass nuclei 131 Ce and 129 Ce have been investigated by means of the β + EC decays of 131g+m Pr and 129 Pr, respectively, The Pr nuclei were obtained by bombarding 94,96 Mo targets with a 255 MeV 40 Ca beam. The radioactivities produced in the reactions were transported with a He-jet device and γγt , X γt , e − γt coincidence measurements were performed. Conversion electrons were measured with a magnetic spectrometer and transition multipolarities were deduced. On-line mass separation was used to select the 129 Pr β-decay. The resulting level schemes of 131,129,127 Ce are discussed in connection with level systematics and calculations performed by using the Interacting Boson-Fermion Model (IBFM). (Elsevier)

Dates and versions

in2p3-00012971 , version 1 (22-02-1999)



A. Gizon, J. Genevey, D. Bucurescu, G. Cata-Danil, J. Gizon, et al.. Level structures of $^{131,129}$Ce observed in beta decay. Nuclear Physics A, 1996, 605, pp.301-333. ⟨10.1016/0375-9474(96)00178-9⟩. ⟨in2p3-00012971⟩
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