Abstract

The decay of 187Hg is studied using “on-line” mass-separated sources. A decay scheme is proposed. The negative parity states are analysed within the “quasi-particle + triaxial rotor” model of Meyer-ter-Vehn: it is found that the 11 2 − state at 224 keV corresponds to a nuclear deformation β = 0.14 and γ = 35 and the 9 2 − state at 120.6 keV to a deformation β = 0.2 and γ = 21°. A systematic analysis of the heavier odd-mass gold isotopes is given in the framework of this model.

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