K{sup {pi}}=8{sup {minus}} rotational band and its fragmented decay through the K{sup {pi}}=6{sup +} intrinsic state in {sup 170}Hf

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.60.057303· OSTI ID:688077

Cullen, D M; Appelbe, D E; Reed, A T ^[1]; Baktash, C ^[2]; Lee, I Y; Macchiavelli, A O ^[3]

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1. Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool L69 7ZE (United Kingdom)
2. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6371 (United States)
3. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

A K{sup {pi}}=8{sup {minus}} strongly coupled rotational band, which is built upon a 23 ns isomeric state, has been established in {sup 170}Hf. The single-particle configuration of the band has been determined from the in-band to out-of-band branching ratios and associated {vert_bar}(g{sub K}{minus}g{sub R}){vert_bar}/Q{sub 0} values. The {gamma}-ray decay of the K{sup {pi}}=8{sup {minus}} isomeric state proceeds through a K{sup {pi}}=6{sup +} intrinsic state, in accordance with the {ital K}-selection rule. A complex array of delayed {gamma}-ray transitions have been observed to link this K{sup {pi}}=6{sup +}, intrinsic bandhead state into the yrast states. In particular, a new {Delta}K=8, 1141 keV, E1 transition links the K{sup {pi}}=8{sup {minus}} isomeric state directly to the ground-state band. The {gamma}-ray reduced hindrance factor for this E1 decay in {sup 170}Hf is the smallest {Delta}K=8 transition observed in the Hf nuclei. However, its value is consistent with that expected on the basis of the increased Coriolis mixing which occurs in the lighter Hf isotopes. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 688077
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 60; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BRANCHING RATIO
GAMMA DECAY
GAMMA SPECTRA
HAFNIUM 170
NUCLEAR DECAY
ROTATIONAL STATES
YRAST STATES