Deformation properties of the neutron-deficient odd-A Pt and Hg nuclei

Physics of Atomic Nuclei - 2001
J. Sauvage1, J. Libert1, B. Roussière1, D. Verney1, L. Cabaret2,1, J. E. Crawford3,1, J. Genevey1,4, G. Huber1,5, F. Ibrahim1, F. Le Blanc1, J. K. P. Lee3,1, J. Oms1, J. Pinard2,1
1Institut de Physique Nucléaire, IN2P3-CNRS, Orsay, France
2Laboratoire Aimé Cotton, Orsay, France
3Physics Department, McGill University, Montréal, Canada
4Institut des Sciences Nucléaires, IN2P3-CNRS/UJF, Grenoble, France
5Institut für Physik der Universität, Mainz, Germany

Tóm tắt

Nuclear and atomic spectroscopy measurements have provided a great number of data on the neutron-deficient Pt and Hg nuclei. The odd-A Pt and Hg with A<186 have a prolate shape, and the even-even isotopes have a triaxial shape, while the nuclear shape of the odd-A Pt and Hg with A>186 is still an open question. The energy of the low-lying levels and the nuclear moments have been calculated in the framework of a semimicroscopic “axial-rotor + 1 quasiparticle” coupling model. The predictions are compared with the experimental data and discussed. The results strongly suggest a prolate shape for the negative-parity low-lying states of the odd-A 187–191Pt and 187–193Hg isotopes.

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Physics of Atomic Nuclei

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