Volume 123, Number 4, August 2018
|Number of page(s)||4|
|Published online||07 September 2018|
Coexistence, mixing and fluctuation of nuclear shapes
1 “Horia Hulubei” National Institute for Physics and Nuclear Engineering - Str. Reactorului 30, RO-077125, POB-MG6 Bucharest-Mǎgurele, Romania
2 Academy of Romanian Scientists - 54 Splaiul Independenţei, Bucharest, RO-050094, Romania
Received: 1 August 2018
Accepted: 28 August 2018
The coexistence between near-spherical and well-deformed shapes in nuclear systems is studied by a schematic collective model employing a double-minimum phenomenological potential with an accounted centrifugal contribution from the kinetic energy. The quantum tunneling between the two deformation minima depends on the characteristics of the separating barrier and is gauged by the density probability distribution of deformation in the ground and excited states. Various degrees of overlap between the two states are associated to shape coexistence with and without mixing or to simple shape fluctuation phenomena. The effect of the interaction between deformation configurations on the transition observables is exemplified on the 76Kr nucleus.
PACS: 21.60.Ev – Collective models / 21.10.Re – Collective levels / 27.50.+e – 59 ≤ A ≤ 89
© EPLA, 2018
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