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26 April 2024

» pubmed » pmid12484939

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Coulomb excitation paths of high-K isomer bands in 178Hf
A B Hayes ; D Cline ; C Y Wu ; M W Simon ; R Teng ; J Gerl ; Ch Schlegel ; H J Wollersheim ; A O Macchiavelli ; K Vetter ; P Napiorkowski ; J Srebrny ;
Date:	9 Dec 2002
Journal:	Phys Rev Lett, 89 (24), 242501
Abstract:	Three distinctly different mechanisms are shown to populate the K(pi)=6(+) (t(1/2)=77 ns), 16(+) (31 yr), and 8(-) (4 s) isomer bands of 178Hf by Coulomb excitation. High spin states of the three isomer bands were populated by Coulomb excitation of a hafnium target with a 650 MeV 136Xe beam. Although direct population of high-K bands is highly K-forbidden, isomer bands in 178Hf were populated up to spins 13(+)(K=6), 20(+)(K=16), and 14(-)(K=8) with in-band gamma yields of approximately 10(-4) of the ground state band. The data are consistent with a rapid increase in K mixing with increasing spin in the isomer bands.
Source:	PubMed, pmid12484939
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