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Evidence for shape coexistence in $^{98}$Mo

Abstract : A γγ angular-correlation experiment has been performed to investigate the low-energy states of the nucleus 98Mo. The new data, including spin assignments, multipole mixing ratios, and lifetimes reveal evidence for shape coexistence and mixing in 98Mo, arising from a proton intruder configuration. This result is reproduced by a theoretical calculation within the proton-neutron interacting boson model with configuration mixing, based on microscopic energy density functional theory. The microscopic calculation indicates the importance of the proton particle-hole excitation across the Z = 40 subshell closure and the subsequent mixing between spherical vibrational and the γ -soft equilibrium shapes in 98Mo.
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Contributor : Michel Lion <>
Submitted on : Thursday, October 24, 2013 - 10:31:21 AM
Last modification on : Thursday, February 1, 2018 - 1:25:48 AM

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T. Thomas, K. Nomura, V. Werner, T. Ahn, N. Cooper, et al.. Evidence for shape coexistence in $^{98}$Mo. Physical Review C, American Physical Society, 2013, 88, pp.044305. ⟨10.1103/PhysRevC.88.044305⟩. ⟨in2p3-00871283⟩



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