Emergence of High-Order Deformation in Rotating Transfermium Nuclei: A Microscopic Understanding

Abstract

The rotational properties of the transfermium nuclei are investigated in the full deformation space by implementing a shell-model-like approach in the cranking covariant density functional theory on a three-dimensional lattice, where the pairing correlations, deformations, and moments of inertia are treated in a microscopic and self-consistent way. The kinematic and dynamic moments of inertia of the rotational bands observed in the transfermium nuclei ${}^{252}$No, ${}^{254}$No, ${}^{254}$Rf, and ${}^{256}$Rf are well reproduced without any adjustable parameters using a well-determined universal density functional. It is found for the first time that the emergence of the octupole deformation should be responsible for the significantly different rotational behavior observed in ${}^{252}$No and ${}^{254}$No. The present results provide a microscopic solution to the long-standing puzzle on the rotational behavior in No isotopes, and highlight the risk of investigating only the hexacontetrapole (${\beta }_{60}$) deformation effects in rotating transfermium nuclei without considering the octupole deformation.

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Cited by in corpus (2)

• Low-energy spectra of nobelium isotopes: Skyrme random-phase-approximation analysis
• Exact-exchange relativistic density functional theory in three-dimensional coordinate space