Elsevier

Nuclear Physics A

Volume 413, Issue 3, 6 February 1984, Pages 375-415
Nuclear Physics A

Intrinsic reflection asymmetry in odd-A nuclei

https://doi.org/10.1016/0375-9474(84)90417-2Get rights and content

Abstract

A theoretical description is formulated for odd-A nuclei whose intrinsic shape is axially elongated and statically or dynamically reflection asymmetric. It is used to evaluate data in the Ra-Ac-Th-Pa region on energy levels, decoupling factors, α-transitions and electromagnetic M1, E1 and E3 matrix elements. The results provide firm empirical evidence for a predicted transition from octupole vibrations above A ∼ 229 to more or less stable octupole deformation in lighter isotopes. Some parity-mixed Nilsson orbitals resulting from strong coupling to the intrinsic reflection asymmetry can be identified.

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