Study of Signature Inversion in the πi<SUB>13/2 </SUB>νi<SUB>13/2</SUB>Bands of Odd Odd Nuclei

ZHANG Yu-Hu; ZHOU Xiao-Hong; HE Jian-Jun; LIU Zhong; GAN Zai-Guo

Chinese Physics C> 2003, Vol. 27> Issue(4) : 313-318

Study of Signature Inversion in the πi_13/2νi_13/2Bands of Odd Odd Nuclei

ZHANG Yu-Hu ,
ZHOU Xiao-Hong ,
HE Jian-Jun ,
LIU Zhong ,
GAN Zai-Guo ,
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,

InstituteofModernPhysics,ChineseAcademyofSciences,Lanzhou 730000,China2 JapanAtomicEnergyResearchInstitute,Tokai,Ibaraki3 19-1195,Japan3 DepartmentofPhysics,KyushuUniversity,Fukuoka 812-81,Japan4 ChibaUniversity,Inage ku,Chiba 263-8512,Japan5 Chiba Instituteof Technology,Narashino,Chiba 275-0023,Japan6 Instituteof Physicsand Tandem Accelerator Center,Universityof Tsukuba,Ibaraki 305-0006,Japan7 China Instituteof Atomic Energy,Beijing 102413,China8 Departmentof Technical Physicsand MOEKey Laboratory,Peking University,Beijing 100871,China

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Abstract：
High-spin states in odd-odd nuclei of ^176,178Ir and ¹⁸²Au have been studied experimentally using heavy-ion- induced fusion-evaporation reactions and standard in-beam γ-ray spectroscopic techniques. Rotational bands built on the πi_13/2νi_13/2 configuration have been observed. In addition, on the basis of level spacing systematics, spin assignments have been proposed for the πi_13/2νi_13/2 band in ¹⁸⁴ Au,which was reported without spin assignments in previous study. It is pointed out that the πi_13/2νi_13/2 bands in ^176,178Ir and ^182,184Au present a low-spin signature inversion. In the theoretical framework of 2-quasiparticle plus rotor model with p- n residual interaction, the signature inversion phenomenon in the πi_13/2νi_13/2 bands has been discussed qualitatively. Theoretical investigations have been performed for the πh_9/2νi_13/2 and πi_13/2 νi_13/2 bands using the cranked shell model. It is found that the signature inversions in both configurations can be well reproduced using the pairing and deformation self-consistent cranked Wood-Saxon calculations.

References

[1]

. Bengtsson R ,Frisk R H ,May R F et al.Nucl.Phys.,1984,A415:189 2. LIU Y Z ,MA Y J, YONG H T et al. Phys. Rev.,1995,C52(4):2514 3. LIU Y Z , LU J B ,MA Y J et al.Phys.Rev.,1996,C54(4):719 4. Bermudez ＧＧ, Cardona M A .Phys.Rev.,2001,C64(4):034311 5. Cardona M A ,Kreiner A J, Hojman D et al.Phys.Rev.,1999,C59:1298 6. ZHANG Y H ,ZHAO Q Z ,ZHU S F et al.Phys.Rev.,1999,C60:044311 7. ZHANG Y H ,ZHAO Q Z ,ZHANG S Q et al. High Energy Phys.and Nucl.Phys.,2000,24(sup.):21(in Chinese);ZHANG Y H ,Hayakawa T ,Oshima M et al. Eur.Phys.J .,2000,A8(4):439(张玉虎,赵庆中,张双全等.高能物理与核物理,2000,24(增刊):21) 8. ZHAO G Y ,LU J B ,MA Y J et al. High Energy Phys.and Nucl.Phys.,2000,24(sup.):33(in Chinese)(赵广义,陆景彬,马英君等.高能物理与核物理,2000,24(增刊):33) 9. DENG F G ,YANG C X ,SUN H B et al.High Energy Phys.and Nucl.Phys.,2002,26:(5)491(in Chinese)(邓富国,杨春向,孙慧斌等.高能物理与核物理,2002,26(5):491) 10. XU F R ,Satula W ,Wyss R .Nucl.Phys.,2000,A669:119 11. ZHENG R R et al.Phys.Rev.,1997,C56:175;Phys.Rev.,2001,C64:014313 12. ZHANG Y H ,Oshima M ,Toh Y et al. High Energy Phys.and Nucl.Phys.,2002,26(5):445(in Chinese)(张玉虎,Oshima M ,Toh Y et al.高能物理与核物理,2002,26(5):445) 13. ZHANG Y H ,Hayakawa T ,Oshima M et al.Chin.Phys.Lett.,2001,18(10):1323 14. Hojman D ,Cardona M A ,Napoli D R et al.Eur.Phys.J.,2001,A10(3):245 15. ZHANG Y H ,Hayakawa T ,Oshima M et al.Phys.Rev.,2002,C65:014302 16. Ibrahim F ,Hojman D ,Kreiner A J et al.Phys.Rev.,1996,C53(4):1547 17. ZHANG Y H ,XU F R ,He J J et al.Eur.Phys.J.,2002,A14(3):271 18. Bark R A ,Espino J M ,Reviol W et al.Phys.Lett.,1997,B406:193 19. Kreiner A J ,Davidson J ,Davidson M et al.Phys.Rev.,1987,C36:2309 20. Kreiner A J . Phys.Rev.,1980,C22:2570 21. YANG C X ,WEN S X ,LI S G et al.Chin. J. Nucl.Phys.,1994,16:223

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[18]	KONG Ling-Jiang , LIU Ji-Feng . ON THE LOW-EXCITED STATES OF THE HYPERNUCLEUS ¹³C AND ¹⁷O. Chinese Physics C, 1990, 14(5): 435-443.
[19]	ZHANG Jing-Ye . THE ROLE OF NEUTRON i_13/2 CONFIGURATION IN SUPERD EFORMED STATES IN A=120—140 MASS REGION. Chinese Physics C, 1990, 14(9): 855-858.
[20]	ZHANG Jing-Ye , ZHONG Ji-Quan , JIAO Dun-Pang , GE Yuan-Xiu , MA Xi-Liang . ON THE νi_13/2PAIR IN EVEN Pt ISOTOPES. Chinese Physics C, 1987, 11(1): 128-132.

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ZHANG Yu-Hu, ZHOU Xiao-Hong, HE Jian-Jun, LIU Zhong, GAN Zai-Guo, Study of Signature Inversion in the πi_13/2νi_13/2Bands of Odd Odd Nuclei[J]. Chinese Physics C, 2003, 27(4): 313-318.

ZHANG Yu-Hu, ZHOU Xiao-Hong, HE Jian-Jun, LIU Zhong, GAN Zai-Guo, Study of Signature Inversion in the πi_13/2νi_13/2Bands of Odd Odd Nuclei[J]. Chinese Physics C, 2003, 27(4): 313-318. shu

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Received: 2002-06-06
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 Signature Inversion in the πi_13/2νi_13/2Bands of Odd Odd Nuclei

InstituteofModernPhysics,ChineseAcademyofSciences,Lanzhou 730000,China2 JapanAtomicEnergyResearchInstitute,Tokai,Ibaraki3 19-1195,Japan3 DepartmentofPhysics,KyushuUniversity,Fukuoka 812-81,Japan4 ChibaUniversity,Inage ku,Chiba 263-8512,Japan5 Chiba Instituteof Technology,Narashino,Chiba 275-0023,Japan6 Instituteof Physicsand Tandem Accelerator Center,Universityof Tsukuba,Ibaraki 305-0006,Japan7 China Instituteof Atomic Energy,Beijing 102413,China8 Departmentof Technical Physicsand MOEKey Laboratory,Peking University,Beijing 100871,China

Received Date: 2002-06-06

Accepted Date: 1900-01-01

Available Online: 2003-04-05

Abstract: High-spin states in odd-odd nuclei of ^176,178Ir and ¹⁸²Au have been studied experimentally using heavy-ion- induced fusion-evaporation reactions and standard in-beam γ-ray spectroscopic techniques. Rotational bands built on the πi_13/2νi_13/2 configuration have been observed. In addition, on the basis of level spacing systematics, spin assignments have been proposed for the πi_13/2νi_13/2 band in ¹⁸⁴ Au,which was reported without spin assignments in previous study. It is pointed out that the πi_13/2νi_13/2 bands in ^176,178Ir and ^182,184Au present a low-spin signature inversion. In the theoretical framework of 2-quasiparticle plus rotor model with p- n residual interaction, the signature inversion phenomenon in the πi_13/2νi_13/2 bands has been discussed qualitatively. Theoretical investigations have been performed for the πh_9/2νi_13/2 and πi_13/2 νi_13/2 bands using the cranked shell model. It is found that the signature inversions in both configurations can be well reproduced using the pairing and deformation self-consistent cranked Wood-Saxon calculations.

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Study of Signature Inversion in the πi_13/2νi_13/2Bands of Odd Odd Nuclei

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Study of Signature Inversion in the πi_13/2νi_13/2Bands of Odd Odd Nuclei