Elsevier

Nuclear Physics A

Volume 470, Issue 2, 24 August 1987, Pages 266-284
Nuclear Physics A

Levels in 138Ce by in-beam spectroscopy

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Abstract

Gamma ray and conversion electrons from levels in 138Ce have been studied following the 139La(p, 2n)138Ce and 136Ba(α, 2n)138Ce reactions. A level scheme, based on the measurement of conversion coefficients, of gamma-ray angular distributions and excitation functions and of gamma-gamma coincidences, is proposed and compared with findings by other authors. Some transitions observed lead to levels not previously identified in gamma-ray work; in other cases new spin and/or parity assignments have been given. An indication on the nature of some of the observed states is obtained by comparing the experimental data with the predictions of the ALAGA model and of the IBM-2 model.

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Supported by BMFT and by Ministerium für Wissenschaft und Forschung NRW.

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