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Discrete spectroscopy in {sup 180}Os at high spins

Abstract

New information on rotational bands in {sup 180}Os was obtained from a discrete spectroscopy experiment in which the final nucleus was populated through the {sup 150}Nd({sup 36}S,6n) reaction at 177 MeV. A new strongly-coupled rotational band starting at a relatively high excitation energy was found. The observation and placement of the 185.6 keV in the level scheme gives strong support to a hypothetical 2-quasineutron configuration assigned to the 7{sup -} isomeric bands in {sup 180}Os and the isotone {sup 178}W. Band mixing between the (-,1){sub 1} and (-,1){sub 3} bands of same parity and signature was observed, and the interaction strength was estimated from experimental branching ratios. The authors` results confirm a previous assignment for the yrast and yrare sequences in this nucleus. With the identification of new transitions above the states with I {approx_equal} 24, previously assigned bands had to be revised, with the result that the second band crossing vanishes. 23 refs., 3 figs.
Authors:
Marti, G; Venkova, Ts; Morek, T; Schnare, H; Gast, W; Georgiev, A; Spohr, K M; Lieder, R M; [1]  Maier, K H; [2]  Zell, K O [3] 
  1. Institut fuer Kernphysik, KFA-Juelich (Germany)
  2. Hahn-Meitner-Institut Berlin GmbH (Germany)
  3. Institut fuer Kernphysik, Universitaet Koeln (Germany)
Publication Date:
Aug 01, 1992
Product Type:
Technical Report
Report Number:
AECL-10613(v.2); CONF-920548-; CONF-9205444-
Reference Number:
SCA: 663110; 663570; PA: AIX-28:057806; EDB-97:122553; SN: 97001841929
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; OSMIUM 180; GAMMA SPECTRA; HIGH SPIN STATES; ENERGY-LEVEL TRANSITIONS; EXPERIMENTAL DATA; GAMMA SPECTROSCOPY; HEAVY ION FUSION REACTIONS; NEODYMIUM 150 TARGET; NUCLEAR STRUCTURE; ROTATIONAL STATES; SULFUR 36 REACTIONS; YRAST STATES
OSTI ID:
520567
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: CA9700470057806
Availability:
INIS; OSTI as DE97638960
Submitting Site:
INIS
Size:
pp. 117-121
Announcement Date:

Citation Formats

Marti, G, Venkova, Ts, Morek, T, Schnare, H, Gast, W, Georgiev, A, Spohr, K M, Lieder, R M, Maier, K H, and Zell, K O. Discrete spectroscopy in {sup 180}Os at high spins. Canada: N. p., 1992. Web.
Marti, G, Venkova, Ts, Morek, T, Schnare, H, Gast, W, Georgiev, A, Spohr, K M, Lieder, R M, Maier, K H, & Zell, K O. Discrete spectroscopy in {sup 180}Os at high spins. Canada.
Marti, G, Venkova, Ts, Morek, T, Schnare, H, Gast, W, Georgiev, A, Spohr, K M, Lieder, R M, Maier, K H, and Zell, K O. 1992. "Discrete spectroscopy in {sup 180}Os at high spins." Canada.
@misc{etde_520567,
title = {Discrete spectroscopy in {sup 180}Os at high spins}
author = {Marti, G, Venkova, Ts, Morek, T, Schnare, H, Gast, W, Georgiev, A, Spohr, K M, Lieder, R M, Maier, K H, and Zell, K O}
abstractNote = {New information on rotational bands in {sup 180}Os was obtained from a discrete spectroscopy experiment in which the final nucleus was populated through the {sup 150}Nd({sup 36}S,6n) reaction at 177 MeV. A new strongly-coupled rotational band starting at a relatively high excitation energy was found. The observation and placement of the 185.6 keV in the level scheme gives strong support to a hypothetical 2-quasineutron configuration assigned to the 7{sup -} isomeric bands in {sup 180}Os and the isotone {sup 178}W. Band mixing between the (-,1){sub 1} and (-,1){sub 3} bands of same parity and signature was observed, and the interaction strength was estimated from experimental branching ratios. The authors` results confirm a previous assignment for the yrast and yrare sequences in this nucleus. With the identification of new transitions above the states with I {approx_equal} 24, previously assigned bands had to be revised, with the result that the second band crossing vanishes. 23 refs., 3 figs.}
place = {Canada}
year = {1992}
month = {Aug}
}