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Isomer building blocks and K-forbidden decays

Walker, Philip (2017) Isomer building blocks and K-forbidden decays Physica Scripta, 92 (5), 054001.

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Abstract

High-K isomers are long-lived excitations of deformed atomic nuclei. Their structure is built from broken nucleon pairs that generate high angular momentum, K, along the nuclear symmetry axis. The partial conservation of this quantity leads to strong inhibition of electromagnetic decay, and hence to isomerism. The present work examines the hindrance factors for a range of multipole orders, with a focus on highly K-forbidden E1 transitions from multi-quasiparticle isomers in the A ~ 170 region of nuclei. Allowing for a general 104 inhibition of E1 transitions, there is good accord with other multipole orders. A key feature is that the inhibition declines for isomers that are more highly excited, relative to a rigid rotor of the same total angular momentum. Comparison is also made with K-forbidden E1 transitions in the quasicontinuum, and similar inhibition properties are found.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Walker, PhilipP.Walker@surrey.ac.ukUNSPECIFIED
Date : 12 April 2017
Identification Number : 10.1088/1402-4896/aa694d
Copyright Disclaimer : © 2017 The Royal Swedish Academy of Sciences. Published by the Institute of Physics.
Depositing User : Melanie Hughes
Date Deposited : 15 Sep 2017 08:05
Last Modified : 15 Sep 2017 08:20
URI: http://epubs.surrey.ac.uk/id/eprint/842277

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