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Title: Sign of the g factor of the 4{sub 1}{sup +} state in {sup 68}Zn

Abstract

In two recent papers a negative g factor was reported for the 4{sub 1}{sup +} state in {sup 68}Zn. The negative sign is unexpected. It is not consistent with the systematics of g factors in the neighboring Zn and Ge isotopes and could not be explained by shell-model calculations even when significant contributions of the 0g{sub 9/2} neutrons were included. Therefore, an independent g factor measurement was performed, using {sup 68}Zn projectiles which were accelerated to a higher energy in order to obtain a higher yield for the 4{sub 1}{sup +} state. The new measurement yielded a positive g factor, g(4{sub 1}{sup +})=+0.6(3), which agrees with the results of full fp spherical shell model calculations, as well as with Z/A, the collective model prediction.

Authors:
; ; ; ; ;  [1];  [2]; ; ; ; ; ; ;  [3];  [3];  [4]; ; ; ;  [5]
  1. Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States)
  2. Geology and Physics Department, University of Southern Indiana, Evansville, Indiana 47712 (United States)
  3. A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States)
  4. (United Kingdom)
  5. Department of Physics, University of Richmond, Richmond, Virginia 23173 (United States)
Publication Date:
OSTI Identifier:
20990993
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.75.021302; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COLLECTIVE MODEL; GERMANIUM ISOTOPES; LANDE FACTOR; NEUTRONS; SHELL MODELS; SPHERICAL CONFIGURATION; ZINC 68

Citation Formats

Boutachkov, P., Benczer-Koller, N., Kumbartzki, G. J., Escuderos, A., Sharon, Y. Y., Zamick, L., Robinson, S. J. Q., Ai, H., Guerdal, G., Heinz, A., McCutchan, E. A., Quian, J., Werner, V., Williams, E., Chamberlain, M., Department of Physics, University of Surrey, Guildford, Surrey, Aleksandrova, K., Copos, C. A., Kovacheva, D. A., and Manchev, P. Sign of the g factor of the 4{sub 1}{sup +} state in {sup 68}Zn. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.021302.
Boutachkov, P., Benczer-Koller, N., Kumbartzki, G. J., Escuderos, A., Sharon, Y. Y., Zamick, L., Robinson, S. J. Q., Ai, H., Guerdal, G., Heinz, A., McCutchan, E. A., Quian, J., Werner, V., Williams, E., Chamberlain, M., Department of Physics, University of Surrey, Guildford, Surrey, Aleksandrova, K., Copos, C. A., Kovacheva, D. A., & Manchev, P. Sign of the g factor of the 4{sub 1}{sup +} state in {sup 68}Zn. United States. doi:10.1103/PHYSREVC.75.021302.
Boutachkov, P., Benczer-Koller, N., Kumbartzki, G. J., Escuderos, A., Sharon, Y. Y., Zamick, L., Robinson, S. J. Q., Ai, H., Guerdal, G., Heinz, A., McCutchan, E. A., Quian, J., Werner, V., Williams, E., Chamberlain, M., Department of Physics, University of Surrey, Guildford, Surrey, Aleksandrova, K., Copos, C. A., Kovacheva, D. A., and Manchev, P. Thu . "Sign of the g factor of the 4{sub 1}{sup +} state in {sup 68}Zn". United States. doi:10.1103/PHYSREVC.75.021302.
@article{osti_20990993,
title = {Sign of the g factor of the 4{sub 1}{sup +} state in {sup 68}Zn},
author = {Boutachkov, P. and Benczer-Koller, N. and Kumbartzki, G. J. and Escuderos, A. and Sharon, Y. Y. and Zamick, L. and Robinson, S. J. Q. and Ai, H. and Guerdal, G. and Heinz, A. and McCutchan, E. A. and Quian, J. and Werner, V. and Williams, E. and Chamberlain, M. and Department of Physics, University of Surrey, Guildford, Surrey and Aleksandrova, K. and Copos, C. A. and Kovacheva, D. A. and Manchev, P.},
abstractNote = {In two recent papers a negative g factor was reported for the 4{sub 1}{sup +} state in {sup 68}Zn. The negative sign is unexpected. It is not consistent with the systematics of g factors in the neighboring Zn and Ge isotopes and could not be explained by shell-model calculations even when significant contributions of the 0g{sub 9/2} neutrons were included. Therefore, an independent g factor measurement was performed, using {sup 68}Zn projectiles which were accelerated to a higher energy in order to obtain a higher yield for the 4{sub 1}{sup +} state. The new measurement yielded a positive g factor, g(4{sub 1}{sup +})=+0.6(3), which agrees with the results of full fp spherical shell model calculations, as well as with Z/A, the collective model prediction.},
doi = {10.1103/PHYSREVC.75.021302},
journal = {Physical Review. C, Nuclear Physics},
number = 2,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}