Decays of 185m + gHg: Low-spin levels of 185Au as a test of nuclear models |
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Authors: | C Bourgeois P Kilcher B Roussiere J Sauvage-Letessier MG Porquet |
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Institution: | 1. Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, 91406 Orsay, France |
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Abstract: | The decay of 185m + gHg has been studied on-line with mass-separated sources from the ISOCELE facility. Precise conversion-electron measurements were performed with a 180° spectrograph. The isomeric state of 185Hg () was located with respect to the ? ground state (). A level scheme of 185Au has been established. Two abnormally converted M1 transitions de-excite a state local at 330.2 keV. Excited states of 185Au have been discussed in the framework of a “quasi-particle + axial rotor” approach, quasi-particle states being issued from Hartree-Fock plus BCS calculations using the SIII Skyrme force. Most of the low-spin negative-parity levels have been identified as h + f or p + f mixed states. The h system has also been discussed using a model of asingle-j quasi-particle coupled to a triaxial rotor. |
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Keywords: | RADIOACTIVITY |
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