Abstract
Some of the elementary properties of the scissors mode in deformed nuclei are recalled. The effect of a neutron skin on this excitation mode is investigated. It is shown, in the context of a geometric as well as an algebraic model, that the development of a neutron skin can give rise to an additional low-energy mode involving out-of-phase angular oscillations of the skin neutrons against the remaining nucleons of the core. This ‘soft’ scissors mode represents the analogue of the soft dipole mode already postulated to occur in neutron-rich nuclei.
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Van Isacker, P. Geometric and algebraic descriptions of a soft scissors mode. APH N.S., Heavy Ion Physics 6, 45–56 (1997). https://doi.org/10.1007/BF03158481
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DOI: https://doi.org/10.1007/BF03158481