Shape Change of <SUP>129</SUP>Ce at High Spin States

LI Guang-Sheng; DAI Zheng-Yu; LIU Xiang-An; ZHANG Lan-Kuan; WEN Shu-Xian; WU Xiao-Guang; YUAN Guan-Jun; PENG Chao-Hua; WENG Pei-Kun; LI Sheng-Gang; YANG Chun-Xiang

Chinese Physics C> 2001, Vol. 25> Issue(10) : 984-988

Shape Change of ¹²⁹Ce at High Spin States

China Institute of Atomic Energy, Beijing 102413, China

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Abstract：
High spin states of ¹²⁹Ce were populated through the reaction ¹¹⁶Sn(¹⁶O,3n)¹²⁹Ce at a beam energy of 73 MeV. Lifetimes of the excited states were measured using the Doppler shift atten-uation method. The transition quadrupole moments Qt were deduced from lifetime data. The results indicate that collectivity of ¹²⁹Ce is reduced with respect to the even-even core ¹²⁸Ce. This reduction in collectivity caused by the addition of a h_11/2 neutron can be interpreted as due to triaxial deforma-tion induced by shape driving effect. Although the Qt values of the negaive-parity band are some-what smaller than the ones of the positive-parity band, they exhibit a considerably sindlar behavior with increasing angular momentum. It would appear that the two h_11/2 quasiprotons possibly have a dominant innuence on property of the core.

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[1]

Kirwan A J, Ball G C, Bishop P J et al. Pkys. Rev. Lett., 1987, 58(5):467–470 2 CHEN Y S, Frauendorf S, Leander G A et al. Phys. Rev., 1983, C28(6):2437–24453 Cata–Danil G, Nyako B M, Gizon J et al. Z. Phys., 1991, A339(2):313–3144 Nyako B M, Gizon J, Barci V et al. Z. Phys., 1989, A334(4):5135 Tedd D M, Aryaeinejad R, Love D J G et al. J. Phys.. 1984, G10(10):1407–1433 6 Leander G A, Arve P, Bengtsson T et al. Nucl. Phys., 1983, A400:97c–112c7 Aryaeinejad R, Love D J G, Nelson A H et al. J. Phys., 1984, G10(7):955–9678 LI Guang–Sheng, DAI Zheng–Yu, LIU Xiang–An et al. China Phys. Lett., 1998, 15(8):564–565 9 LI G S, DAI Z Y, WEN S X et al. Z. Phys., 1996, A356(2): 119–123 10 Seiler–Clark, Huser D, Novotny R et al. Phys. Lett., 1979, 80B(4,5): 345–347

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LI Guang-Sheng, DAI Zheng-Yu, LIU Xiang-An, ZHANG Lan-Kuan, WEN Shu-Xian, WU Xiao-Guang, YUAN Guan-Jun, PENG Chao-Hua, WENG Pei-Kun, LI Sheng-Gang and YANG Chun-Xiang. Shape Change of ¹²⁹Ce at High Spin States[J]. Chinese Physics C, 2001, 25(10): 984-988.

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Received: 2000-11-03
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Shape Change of ¹²⁹Ce at High Spin States

Corresponding author: LI Guang-Sheng,

China Institute of Atomic Energy, Beijing 102413, China

Received Date: 2000-11-03
Accepted Date: 1900-01-01
Available Online: 2001-10-05

Abstract: High spin states of ¹²⁹Ce were populated through the reaction ¹¹⁶Sn(¹⁶O,3n)¹²⁹Ce at a beam energy of 73 MeV. Lifetimes of the excited states were measured using the Doppler shift atten-uation method. The transition quadrupole moments Qt were deduced from lifetime data. The results indicate that collectivity of ¹²⁹Ce is reduced with respect to the even-even core ¹²⁸Ce. This reduction in collectivity caused by the addition of a h_11/2 neutron can be interpreted as due to triaxial deforma-tion induced by shape driving effect. Although the Qt values of the negaive-parity band are some-what smaller than the ones of the positive-parity band, they exhibit a considerably sindlar behavior with increasing angular momentum. It would appear that the two h_11/2 quasiprotons possibly have a dominant innuence on property of the core.