Study of the Negative-Parity Yrast States in Odd-A Lu-Isotopes

WU XingJu; LIANG YuSheng; XU JinZhang; CHEN XingQu; XING Zheng

Chinese Physics C> 2000, Vol. 24> Issue(4) : 342-346

Study of the Negative-Parity Yrast States in Odd-A Lu-Isotopes

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Department of Modern Physics, Lanzhou University, Lanzhou 730000, China3 Shanghai Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 201800, China4 Physics Department, Liu' an Teacher's College, Anhui 237012, China

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Abstract：
Using Particle-Rotor Model, the energy spectra and electromagnetic transitions of the negative-parity yrast states, before and after the band-crossing in odd-A Lu isotopes, are investigated and compared with the experimental data. It is noted that before and after the band-crossing the moment of inertia of the core is a smooth function of the total angular mo-mentum I and can be described by the ah formula; The triaxial deformation before and after the band-crossing determined from the calculations is appreciably different for ^161,163,165Lu, while it is more or less similar for ¹⁶⁷Lu.

References

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YU C H, Riley M A, Garrentt J D et al. Nucl. Phys., 1988, A489(3):477–507 2 Schmitz W, YANG C X, Hubel H et al. Nucl. Phys.,1992, A539(1): 112–1363 Frandsen P, Chapman R, Garrett J D et al. Nucl.Phys.,1988, A489(3):508–524 4 YU C H, Hagemann G B, Espino J M et al. Nucl.Phys., 1990, A511(1): 157–194 5 Hamamoto I, Sagawa H. Phys.Lett., 1988, B201(4):415–4196 Hamamoto I, Mottelson B. Phys.Lett.,1986, B167(4): 370–374 7 Schnack–Petersen H, Bengtsson R, Bark R A et al. Nucl. Phys.,1995, A594(2): 175–202 8 WU X G, YANG C X, ZHENG H et al. Chin. Phys. Lett., 1997, 14(1): 17–19 9 WU C S, ZENG J Y. High Energy Physics and Nuclear Physics (in Chinese), 1984, 8(2) 1219–226;8(4): 445–452 (吴崇试,曾谨言.高能物理与核物理,1984,8(2):219–226;8(4):445–452)10 CHEN X Q, XING Z. J. Phys., 1993, G19(11):1869–1877

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WU XingJu, LIANG YuSheng, XU JinZhang, CHEN XingQu and XING Zheng. Study of the Negative-Parity Yrast States in Odd-A Lu-Isotopes[J]. Chinese Physics C, 2000, 24(4): 342-346.

WU XingJu, LIANG YuSheng, XU JinZhang, CHEN XingQu and XING Zheng. Study of the Negative-Parity Yrast States in Odd-A Lu-Isotopes[J]. Chinese Physics C, 2000, 24(4): 342-346. shu

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Received: 1999-01-26
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

Study of the Negative-Parity Yrast States in Odd-A Lu-Isotopes

Corresponding author: WU XingJu,

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Department of Modern Physics, Lanzhou University, Lanzhou 730000, China3 Shanghai Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 201800, China4 Physics Department, Liu' an Teacher's College, Anhui 237012, China

Received Date: 1999-01-26
Accepted Date: 1900-01-01
Available Online: 2000-04-05

Abstract: Using Particle-Rotor Model, the energy spectra and electromagnetic transitions of the negative-parity yrast states, before and after the band-crossing in odd-A Lu isotopes, are investigated and compared with the experimental data. It is noted that before and after the band-crossing the moment of inertia of the core is a smooth function of the total angular mo-mentum I and can be described by the ah formula; The triaxial deformation before and after the band-crossing determined from the calculations is appreciably different for ^161,163,165Lu, while it is more or less similar for ¹⁶⁷Lu.