Quasiparticle-phonon model and quadrupole mixed-symmetry states of ⁹⁶Ru

E-ISSN： 2100-014x|107|issue|03001-03001

ISSN： 2100-014x

Source： EPJ Web of Conference, Vol.107, Iss.issue, 2016-01, pp. : 03001-03001

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Abstract

The structure of low-lying quadrupole states of ⁹⁶Ru 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_n and M_p are in-phase, while the neutron and proton transition matrix elements M_n and M_p 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 [2₁⁺]_QRPA and the [2₂⁺]_QRPA states.