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Coulomb excitation paths of high-K isomer bands in 178Hf.

Authors :
Hayes AB
Cline D
Wu CY
Simon MW
Teng R
Gerl J
Schlegel Ch
Wollersheim HJ
Macchiavelli AO
Vetter K
Napiorkowski P
Srebrny J
Source :
Physical review letters [Phys Rev Lett] 2002 Dec 09; Vol. 89 (24), pp. 242501. Date of Electronic Publication: 2002 Nov 20.
Publication Year :
2002

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.

Details

Language :
English
ISSN :
0031-9007
Volume :
89
Issue :
24
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
12484939
Full Text :
https://doi.org/10.1103/PhysRevLett.89.242501