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Triaxiality in $^{105}$ Mo and $^{107}$Mo from the low to intermediate spin region

Abstract : The nuclear structure of the odd $^{105}$ Mo and $^{107}$Mo isotopes was reinvestigated in the present work. The excited levels of $^{105}$ Mo were studied by observing prompt $\gamma$ rays emitted after the spontaneous fission of $^{248}$Cm with the EUROGAM2 multidetector array. The already well studied level structure of $^{107}$Mo was also completed by a search for microsecond isomers. For this purpose, this nucleus was produced by the thermal-neutron induced fission reaction at the ILL reactor, in Grenoble. We have shown that the experimental level energies and the $\gamma$-decay patterns are well reproduced by simple particle-rotor calculations, assuming that these nuclei have an asymmetric shape. The shapes of the odd and even Mo are compared in the neutron range N=62-66.
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Submitted on : Wednesday, November 8, 2006 - 12:18:56 PM
Last modification on : Monday, July 20, 2020 - 9:18:19 AM
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J.A. Pinston, W. Urban, Ch. Droste, J. Genevey, T. Rzaca-Urban, et al.. Triaxiality in $^{105}$ Mo and $^{107}$Mo from the low to intermediate spin region. Physical Review C, American Physical Society, 2006, 74, pp.064304. ⟨10.1103/PhysRevC.74.064304⟩. ⟨in2p3-00112318⟩

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