Chinese Physics C > 2000, Vol. 24 > Issue(S1): 21-28

Experimental Study of High-spin States in Odd-Odd Nuclei around 160-180 Mass Region

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China2 China Institute of Atomic Energy,Beijing 102413,China3 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan4 Chiba University,Inage-ku,Chiba 263-8512,Japan5 Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan6 Institute of Physics and Tandem Accelerator Center,University of Tsukuba,Ibaraki 305-0006,Japan

Abstract
HTML
Reference
Related

PDF

Abstract：

In recent years,high-spin states in a series of deformed odd-odd nuclei¹⁶²Lu,¹⁷⁰Ta,¹⁷⁴Re,^176,178,180Ir and 182Au have been studied in corporation with the researchers in the IMP (Institute of Modem Physics,CAS),CIAE (China Institute of Atomic Energy) and JAERI (Japan Atomic Energy Research Institute).The experimental results are reviewed in this report.The interesting phenomenon of low-spin signature inversion in both the πh_11/2⊙νi_13/2and πh_9/2⊙νi_13/2configurations has been systematically studied and discussed for the nuclei in this mass region.A possible lowspin signature inversion is suggested for the πh_13/2⊙νi_13/2structure in^182,184Au and the limited experimental data seem to support such suggestion.The gradual alignment gains with rotation are reported ,for the first time,in the πh_11/2⊙νi_13/2bands of odd-odd^178,180Ir.An unexpected smaller band crossing frequency is observed in¹⁷⁸Ir(most probably in the πd_5/2⊙νh_9/2configuration).These anomalies may be associated with the configuration-dependent deformations and/or neutron pairing.

References

[1]

Jain A K,Sheline R K,Headly D M et al. Rev. of Mod. Phys. ,1998,70:843-8952 Bengtsson R, Frisk R H, May R F et al. Nucl. Phys. ,1984, A415: 189-2143 LIU Y Z, MA Y J,YANG H T et al. Phys.Rev. .1995,C52:2514-25194 Bark R A,Espino J M,Reviol W et al.Phys. Lett. ,1997, B;106:193-1995 Cardona M A, Kreiner A J , Hojman D et al. Phys. Rev. , 1999, C59 : 1298-13156 ZHANG Y H, ZHANGSQ, ZHAOQZetal. Phys. Rev., 1999, C60: 044311-1--044311-127 Bark R A, Carlmn, Freeman S J et al. Nucl. Phys. , 1998, A630: 603-6308 ZHANG Y H, ZHOU X H, ZHAO Q Z et al. Chin. Jour. of Nucl. Phys. , 1995, 17: 2-253 ; Z. Phys. , 1996,A355 : 335-3369 ZHANG Y H, ZHAO Q Z, ZHOU X H et al. High Energy Phys. and Nucl. Phys. , 1997,21:393-401 (in Chinese)(张玉虎，赵庆中.周小红等.高能物理与核物理，1997,21:393-401)10 ZHANG Y H, Hayakawa T, Oshirna M et al. High Energy Phys. and Nucl. Phys. , 2000, 24: 1123-1130 (in Chinese)(张玉虎，Hayakawa T, Oshitna M et al.高能物理与核物理，2000, 24:1123-1130)11 ZHANG Y H, Hayakawa T, Oshima M et al. Eur. Phys. J. , 1999, A5: 345-34912 ZHANG Y H et al. High Energy Phys. and Nucl. Phys. , 2000, 24: 369-372 (in Chinese) ; Euro. Phys. J. ,2000,A7 : 1-22(张玉虎等.高能物理与核物理，2000,24:369-372)13 Firestone R B, Shirley V S, Baglin C M et al. Table of Isotopes, 1996, 2: 213914 Hamarnoto I. Phys. Lett. , 1990, 8235 :221-22415 Ibrahim F, Hojman D, Kreiner A J et al. Phys. Rev. , 1996, C53: 1547-155616 Janzen V P, LNU Z M, Capenter M P et d. Phys. Rev. , 1996, C45:613-639

Access

Get Citation

ZHANG Yu-Hu, ZHAO Qing-Zhong, ZHANG Shuang-Quan, ZHOU Xiao-Hong, XU Hu-Shan, HUANG Wen-Xue, GUO Ying-Xiang, LEI Xiang-Guo, LIU Zhong, LU Jun, FENG Xi-Chen, GOU Quan-Bu, Experimental Study of High-spin States in Odd-Odd Nuclei around 160-180 Mass Region[J]. Chinese Physics C, 2000, 24(S1): 21-28.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1900-01-01
Revised: 1900-01-01

Article Metric

Article Views(2808)
PDF Downloads(594)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者:陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Experimental Study of High-spin States in Odd-Odd Nuclei around 160-180 Mass Region

Corresponding author:ZHANG Yu-Hu,

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China2 China Institute of Atomic Energy,Beijing 102413,China3 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan4 Chiba University,Inage-ku,Chiba 263-8512,Japan5 Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan6 Institute of Physics and Tandem Accelerator Center,University of Tsukuba,Ibaraki 305-0006,Japan

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:2000-07-15

Abstract:

In recent years,high-spin states in a series of deformed odd-odd nuclei¹⁶²Lu,¹⁷⁰Ta,¹⁷⁴Re,^176,178,180Ir and 182Au have been studied in corporation with the researchers in the IMP (Institute of Modem Physics,CAS),CIAE (China Institute of Atomic Energy) and JAERI (Japan Atomic Energy Research Institute).The experimental results are reviewed in this report.The interesting phenomenon of low-spin signature inversion in both the πh_11/2⊙νi_13/2and πh_9/2⊙νi_13/2configurations has been systematically studied and discussed for the nuclei in this mass region.A possible lowspin signature inversion is suggested for the πh_13/2⊙νi_13/2structure in^182,184Au and the limited experimental data seem to support such suggestion.The gradual alignment gains with rotation are reported ,for the first time,in the πh_11/2⊙νi_13/2bands of odd-odd^178,180Ir.An unexpected smaller band crossing frequency is observed in¹⁷⁸Ir(most probably in the πd_5/2⊙νh_9/2configuration).These anomalies may be associated with the configuration-dependent deformations and/or neutron pairing.