Chin. Phys. Lett.  1997, Vol. 14 Issue (8): 569-572    DOI:
Original Articles |
Reflection Asymmetric Shapes in the Neutron-Rich 140,143Ba Isotopes
ZHU Sheng-jiang1;WANG Mu-ge1;J. H. Hamilton2;A. V. Ramayya2;B. R. S. Babu2;W. C. Ma3;LONG Gui-lu1;DENG Jing-kang1;ZHU Ling-yan1;LI Ming1;T. N. Ginter2;J. Komicki2;J. D. Cole4;R. Aryaeinejadv4;Y. K. Dardenne4;M. W. Drigert4;J. O. Rasmussen5;Yu. Ts. Oganessian5;M. A. Stoyer5;S. Y. Chu5;K. E. Gregorich5;M. F. Mohar5;S. G. Prussin5;I. Y. Lee5;N. R. Johnson6;F. K. McGowan6
1Department of Physics, Tsinghua University, Beijing 100084 2Department of Physics, Vanderbilt University, Nashville, TN 37235, U.S.A. 3Department of Physics, Mississippi State University; MS 39762, U.S.A. 41daho National Engineering Laboratory, Idaho Falls, ID 83415, U.S.A. 5Lawrence Berkeley Laboratory, Berkeley, CA 94720, U.S.A. 6Oak Ridge National Laboratory, Oak Ridge, TN 37831, U. S, A.
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ZHU Sheng-jiang, WANG Mu-ge, J. H. Hamilton et al  1997 Chin. Phys. Lett. 14 569-572
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Abstract Level schemes for the neutron-rich 140,143Ba nuclei have been determined by study of prompt γ-rays in spontaneous fission of 252Cf. The level pattern and enhanced E1 transitions between π = + and π = - bands show reflection asymmetric shapes with simplex quantum number s = +1 in 140Ba and s = ±i in 143Ba, respectively. The octupole deformation stability with spin variation has been discussed.
Keywords: 21.10.Re      21.60.Ev      27.60.+j     
Published: 01 August 1997
PACS:  21.10.Re (Collective levels)  
  21.60.Ev (Collective models)  
  27.60.+j (90 ≤ A ≤ 149)  
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ZHU Sheng-jiang
WANG Mu-ge
J. H. Hamilton
A. V. Ramayya
B. R. S. Babu
W. C. Ma
LONG Gui-lu
DENG Jing-kang
ZHU Ling-yan
LI Ming
T. N. Ginter
J. Komicki
J. D. Cole
R. Aryaeinejadv
Y. K. Dardenne
M. W. Drigert
J. O. Rasmussen
Yu. Ts. Oganessian
M. A. Stoyer
S. Y. Chu
K. E. Gregorich
M. F. Mohar
S. G. Prussin
I. Y. Lee
N. R. Johnson
F. K. McGowan
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