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Title: Evidence for Collective Oblate Rotation in N = Z {sup 68}Se

Abstract

A {gamma} -ray spectroscopic measurement of the N=Z nucleus {sup 68}Se has been made following the {sup 12}C( {sup 58}Ni, 2 n) reaction at 185 and 220 MeV using Gammasphere and the Argonne Fragment Mass Analyzer. Despite a very low production cross section of 200(50) {mu}b , two distinct rotational bands were found; the ground state band consistent with oblate collective rotation, and an excited band consistent with prolate rotation. These observations support long-standing predictions that nuclear ground states with substantial oblate ({beta}{sub 2}{approx}-0.3) deformation should exist in this region. (c) 2000 The American Physical Society.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
20216331
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 84; Journal Issue: 18; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; SELENIUM 68; ROTATIONAL STATES; GAMMA SPECTRA; CARBON 12 TARGET; NICKEL 58 REACTIONS; NEUTRONS; NUCLEAR DEFORMATION; EXPERIMENTAL DATA

Citation Formats

Fischer, S. M., Balamuth, D. P., Hausladen, P. A., Lister, C. J., Carpenter, M. P., Seweryniak, D., and Schwartz, J. Evidence for Collective Oblate Rotation in N = Z {sup 68}Se. United States: N. p., 2000. Web. doi:10.1103/PhysRevLett.84.4064.
Fischer, S. M., Balamuth, D. P., Hausladen, P. A., Lister, C. J., Carpenter, M. P., Seweryniak, D., & Schwartz, J. Evidence for Collective Oblate Rotation in N = Z {sup 68}Se. United States. doi:10.1103/PhysRevLett.84.4064.
Fischer, S. M., Balamuth, D. P., Hausladen, P. A., Lister, C. J., Carpenter, M. P., Seweryniak, D., and Schwartz, J. Mon . "Evidence for Collective Oblate Rotation in N = Z {sup 68}Se". United States. doi:10.1103/PhysRevLett.84.4064.
@article{osti_20216331,
title = {Evidence for Collective Oblate Rotation in N = Z {sup 68}Se},
author = {Fischer, S. M. and Balamuth, D. P. and Hausladen, P. A. and Lister, C. J. and Carpenter, M. P. and Seweryniak, D. and Schwartz, J.},
abstractNote = {A {gamma} -ray spectroscopic measurement of the N=Z nucleus {sup 68}Se has been made following the {sup 12}C( {sup 58}Ni, 2 n) reaction at 185 and 220 MeV using Gammasphere and the Argonne Fragment Mass Analyzer. Despite a very low production cross section of 200(50) {mu}b , two distinct rotational bands were found; the ground state band consistent with oblate collective rotation, and an excited band consistent with prolate rotation. These observations support long-standing predictions that nuclear ground states with substantial oblate ({beta}{sub 2}{approx}-0.3) deformation should exist in this region. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevLett.84.4064},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 18,
volume = 84,
place = {United States},
year = {2000},
month = {5}
}