Reflection Asymmetric Shapes in the Neutron-Rich 140,143Ba Isotopes

Zhu Sheng-jiang (S J Zhu); 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 Aryaeinejad; Y K Dardenne; M W Drigert; J O Rasmussen; Ts Yu 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

doi:10.1088/0256-307X/14/8/003

Chinese Physics Letters

Reflection Asymmetric Shapes in the Neutron-Rich ^140,143Ba Isotopes

Zhu Sheng-jiang (S J Zhu)¹, 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 Aryaeinejad⁴, Y K Dardenne⁴, M W Drigert⁴, J O Rasmussen⁵, Ts Yu Oganessian⁵, M A Stoyer⁵, S Y Chu⁵, K E Gregorich⁵, M F Mohar⁵, S G Prussin⁵, I Y Lee⁶, N R Johnson⁶ and F K McGowan⁶

Published under licence by IOP Publishing Ltd
Chinese Physics Letters, Volume 14, Number 8 Citation Zhu Sheng-jiang (S J Zhu) et al 1997 Chinese Phys. Lett. 14 569 DOI 10.1088/0256-307X/14/8/003

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¹ Department of Physics, University Tsinghua, Beijing 100084

² Department of Physics, Vanderbilt University, Nashville, TN 37235, USA

³ Department of Physics, Mississippi State University, MS 39762, USA

⁴ Idaho National Engineering Laboratory, Idaho Falls, ID 83415, USA

⁵ Lawrence Berkeley Laboratory, Berkeley, CA 94720, USA

⁶ Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

Dates

Received 21 February 1997

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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.

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