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Quasiparticle-phonon model and quadrupole mixed-symmetry states of Ru

EPJ Web of Conferences, ISSN: 2100-014X, Vol: 107
2016
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Conference Paper Description

The structure of low-lying quadrupole states of Ru was calculated within the Quasiparticle-Phonon Model. It is shown that symmetric and mixed-symmetry properties manifest themselves via the structure of the excited states. The first 2 state is collective and neutron and proton transition matrix elements M and M are in-phase, while the neutron and proton transition matrix elements M and M have opposite signs for the third 2 state. This property of the third 2 state leads to a large M1 transition between the first and third 2 states. It is an unambigous demonstration of the mixed-symmetry nature of the third 2 state. The structure of the first 1 state is calculated. The state is a member of the two-phonon multiplet generated by the coupling of the [2] and the [2] states.

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