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High-K rotational bands in {sup 174}Hf and {sup 175}Hf

Abstract

High sensitivity experiments with {sup 48}Ca, {sup 18}O and {sup 9}Be induced reactions using the ESSA-30, TESSA-3 and NORDBALL arrays have provided extensive new information on the high spin level structures of {sup 174}Hf and {sup 175}Hf. During the series of experiments, several new bands have been found and most known bands have been extended considerably. Spin and excitation energy ranges for {sup 174}Hf are now {approx} 35 {Dirac_h} and {approx} 13 MeV, respectively, and for {sup 175}Hf ranges are {approx} 30 {Dirac_h} and {approx} 7 MeV. respectively. Several new high-K structures have been found in {sup 174}Hf and the structure of these and the already known high-K bands in both nuclei together with the new Tilted Axis Cranking approach might explain the small K-hindrances observed for K-isomers in this region. (author). 8 refs., 2 figs.
Authors:
Gjoerup, N L; Sletten, G; [1]  Walker, P M; [2]  Bentley, M A; [3]  Cullen, D M; Sharpey-Schafer, J F; Fallon, P; Smith, G [4] 
  1. The Niels Bohr Institute, Roskilbe (Denmark)
  2. Surrey Univ., Guildford (United Kingdom). Dept. of Physics
  3. Daresbury Lab. (United Kingdom)
  4. Liverpool Univ. (United Kingdom). Oliver Lodge Lab.
Publication Date:
Aug 01, 1992
Product Type:
Technical Report
Report Number:
AECL-10613(v.2); CONF-920548-; CONF-9205444-
Reference Number:
SCA: 663110; 663220; 663570; PA: AIX-28:057811; EDB-97:122509; SN: 97001841934
Resource Relation:
Conference: Workshop on large gamma-ray detector arrays, Ottawa (Canada); Chalk River (Canada), 18-23 May 1992; 19-23 May 1992; Other Information: PBD: Aug 1992; Related Information: Is Part Of Proceedings of the international conference on nuclear structure at high angular momentum and the workshop on large gamma-ray detector arrays; PB: 500 p.
Subject:
66 PHYSICS; HAFNIUM 174; HIGH SPIN STATES; HAFNIUM 175; BERYLLIUM 9 REACTIONS; CALCIUM 48 REACTIONS; CRANKING MODEL; DE-EXCITATION; DEFORMED NUCLEI; ENERGY-LEVEL TRANSITIONS; ERBIUM 170 TARGET; EXPERIMENTAL DATA; GAMMA SPECTRA; HEAVY ION FUSION REACTIONS; ROTATIONAL STATES; SELECTION RULES; SHELL MODELS; TELLURIUM 130 TARGET; YRAST STATES
OSTI ID:
520572
Research Organizations:
Atomic Energy of Canada Ltd., Chalk River, ON (Canada). Chalk River Nuclear Labs.
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
Other: ON: DE97638960; TRN: CA9700476057811
Availability:
INIS; OSTI as DE97638960
Submitting Site:
INIS
Size:
pp. 160-164
Announcement Date:

Citation Formats

Gjoerup, N L, Sletten, G, Walker, P M, Bentley, M A, Cullen, D M, Sharpey-Schafer, J F, Fallon, P, and Smith, G. High-K rotational bands in {sup 174}Hf and {sup 175}Hf. Canada: N. p., 1992. Web.
Gjoerup, N L, Sletten, G, Walker, P M, Bentley, M A, Cullen, D M, Sharpey-Schafer, J F, Fallon, P, & Smith, G. High-K rotational bands in {sup 174}Hf and {sup 175}Hf. Canada.
Gjoerup, N L, Sletten, G, Walker, P M, Bentley, M A, Cullen, D M, Sharpey-Schafer, J F, Fallon, P, and Smith, G. 1992. "High-K rotational bands in {sup 174}Hf and {sup 175}Hf." Canada.
@misc{etde_520572,
title = {High-K rotational bands in {sup 174}Hf and {sup 175}Hf}
author = {Gjoerup, N L, Sletten, G, Walker, P M, Bentley, M A, Cullen, D M, Sharpey-Schafer, J F, Fallon, P, and Smith, G}
abstractNote = {High sensitivity experiments with {sup 48}Ca, {sup 18}O and {sup 9}Be induced reactions using the ESSA-30, TESSA-3 and NORDBALL arrays have provided extensive new information on the high spin level structures of {sup 174}Hf and {sup 175}Hf. During the series of experiments, several new bands have been found and most known bands have been extended considerably. Spin and excitation energy ranges for {sup 174}Hf are now {approx} 35 {Dirac_h} and {approx} 13 MeV, respectively, and for {sup 175}Hf ranges are {approx} 30 {Dirac_h} and {approx} 7 MeV. respectively. Several new high-K structures have been found in {sup 174}Hf and the structure of these and the already known high-K bands in both nuclei together with the new Tilted Axis Cranking approach might explain the small K-hindrances observed for K-isomers in this region. (author). 8 refs., 2 figs.}
place = {Canada}
year = {1992}
month = {Aug}
}