Elsevier

Nuclear Physics A

Volume 557, 31 May 1993, Pages 419-437
Nuclear Physics A

High-spin states in odd-odd nuclei

https://doi.org/10.1016/0375-9474(93)90559-GGet rights and content

Abstract

High-spin states in doubly odd nuclei of 124Cs, 126Cs and 124La have been investigated by γ ray spectroscopy. Rotational bands of π h112 ⊗ νh112 configuration have been assigned by the blocking argument on the first band crossing frequencies for neighboring odd-A nuclei. In cesium isotopes, the signature inversion of quasiparticle routhians has been observed. The spin of the band head in 124Cs has been determined to be (7+) by means of spectroscopic method. This spin assignment implies that the signature inversion occurs at low spin. The signature dependence becomes normal at higher spins than 17ħ. The occurrence of the signature inversion in the A ∼ 130 mass region is discussed by comparing excitation energies, transition intensities and the shell-model orbits of valence nucleons with those of rare-earth nuclei.

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  • Cited by (0)

    1

    Present address Sharp Electric Co. Nara, Japan.

    2

    Present address RIKEN Wko-shi, Saitama, Japan.

    3

    Present address Departamanto de Fisica Atomica, Molecular y Nuclear, Universidad de Sevilia, Spain.

    4

    Present address Department of Physics, University of Montreal, Canada.

    5

    Present address Uppsala University, NFL, Studsvik, S-611 82 Nykopig, Sweden.

    6

    Present address The Svedberg Laboratory, Uppsala University, Box 533, S-751 Uppsala, Sweden.

    7

    Present address Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720, USA.

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