Abstract
The high-K isomeric states in light superheavy nuclei around A = 250 mass region are investigated by the Cranked Shell Model (CSM) with pairing treated by a Particle-Number Conserving (PNC) method. With including the higher-order deformation ε6, both of the high–K multi-particle state energies and the rotational bands in 254No and N = 150 isotone are reproduced well. The isomeric state energies and the microscopic mechanism of kinematic moment of inertia variations versus rotational frequency are discussed. The irregularity of the two-neutron Kπ = 8- state band at ħω ≈ 0:17 in 252No is caused by the configuration mixing with the two-proton Kπ = 8- band. .
Highlights
IntroductionFour-particle states are observed, like the 2.928(3) MeV 184(2)μs isomer in 254No [4] and 247(73)μs isomer in 254Rf [5]
In recent decades, intensive studies of the in-beam and decay spectroscopic have been performed on the light well-deformed superheavy nuclei around A = 250 mass region
The high−K multi-particle state bands in 254No and the Kπ = 8− isomeric bands observed systematically in N = 150 isotone are investigated by Cranked Shell Model with pairing correlation treated by Particle-Number-Conserving method
Summary
Four-particle states are observed, like the 2.928(3) MeV 184(2)μs isomer in 254No [4] and 247(73)μs isomer in 254Rf [5]. These experimental data provide valuable informations to explore the structure of the light superheavy nuclei and to test the nuclear theoretical models. The high−K multi-particle state bands in 254No and the Kπ = 8− isomeric bands observed systematically in N = 150 isotone are investigated by Cranked Shell Model with pairing correlation treated by Particle-Number-Conserving method
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