Chinese Physics C > 2002, Vol. 26 > Issue(5): 445-449

Signature Inversion Phenomena in the Rotational Bands of Odd-Odd¹⁷⁶Ir

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China2 Japan Atomic Energy Research Institute,Tokai mura,Ibaraki 319-1195,Japan3 Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan4 Chiba University,Inage ku,Chiba 263-8512,Japan5 Department of Physics,Kyushu University,Fukuoka 812-81,Japan6 China Institute of Atomic Energy,Beijing 102413,China

Abstract
HTML
Reference
Related

PDF

Abstract：
High spin states in ¹⁷⁶Ir have been investigated via the ¹⁴⁹Sm( ³¹P,4nγ) ¹⁷⁶Ir reaction through excitation functions, X-γ and γ-γ coincidence measurements. Four rotational bands have been identified for the first time and their configurations are suggested on the basis of the existing knowledge of band structures in odd-odd nuclei as well as the measured in-band B(M1)/B(E2) ratios. Among the four bands observed,the πh _9/2;νi _13/2and πi _13/2;νi _13/2bands exhibit an anomalous signature splitting. The signature inversion point is observed in the former at I _c=18 which is consistent with expectations;this signature inversion spin in the πi _13/2;νi _13/2band may be larger than 25h.

References

[1]

. Bengtsson R et al. Nucl. Phys.,1984,A415:189 2. Garcfa Bermúdez,G Cardona M A .Phys.Rev.,2001,C64:034311 3. ZHANG Y H et al. Eur. Phys. Jou.,2000, A8:439 4. Bark R A et al. Phys. Lett.,1997,B406:193 5. Dracoulis G D et al. Nucl. Phys.,1991,A534:1736. Browne E, Huo J. Nucl. Data Sheets,1998,84:337 7. Bosch U et al. Z. Phys.,1990,A336:3598. ZHANG Y H et al. Chin. Phys. Lett.,2001,18:1323 9. ZHANG Y H et al.High Energy Phys. and Nucl. Phys.,2000,24(supp.):21(inChinese)(张玉虎等.高能物理与核物理,2000,24(增刊):21)10. Hojman D et al. Eur. Phys. J.,2001,A10:245 11. Furuno K et al. Nucl. Instrum. Methods Phys. Res.,1999,A421:211 12. Kreiner A J et al. Phys. Rev.,1987,C36:2309 13. Fabricius B et al. Nucl. Phys.,1990,A511:345 14. Cardona M A et al. Phys. Rev.,1999,C59:129815. Hojman D et al. Phys. Rev.,1992,C45:90

[1]	FANG Yong-De,ZHANG Yu-Hu,ZHOU Xiao-Hong. Study of Quasiparticles Bands in Odd-Odd¹⁸⁸Au. Chinese Physics C, 2006, 30(2): 99-104.
[2]	ZHANG Yu-Hu,ZHOU Xiao-Hong,HE Jian-Jun,LIU Zhong,FANG Yong-De,GUO Wen-Tao,LEI Xiang-Guo,GUO Ying-Xiang,MA Long,Moyo Ndontchueng. Search for Signature Inversion in the πi_13/2⊙νi_13/2Bands in^182,184,186Au. Chinese Physics C, 2006, 30(S2): 208-210.
[3]	HE Chuang-Ye,ZHU Li-Hua,WU Xiao-Guang,WANG Zhi-Min,LIU Ying,SUN Hui-Bin,WEN Shu-Xian,LI Guang-Sheng,YANG Chun-Xiang. Systematics of Signature Inversion in Odd-Odd Nuclei in the A～100 Mass Region. Chinese Physics C, 2006, 30(S2): 175-176.
[4]	MA Long,ZHOU Xiao-Hong,ZHANG Yu-Hu,GUO Ying-Xiang. Signature Inversion in the πh_9/2×υi_13/2Oblate Band of 188TL. Chinese Physics C, 2006, 30(5): 402-404.
[5]	ZHOU Xiao-Hong,XING Ye-Bing,MA Long,ZHANG Yu-Hu,LIU Yuan. Low-Spin Signature Inversion in the πh_9/2⊙νi_13/2Oblate Band. Chinese Physics C, 2006, 30(S2): 211-213.
[6]	WANG Hua-Lei,ZHANG Yu-Hu,ZHOU Xiao-Hong,GUO Ying-Xiang,LEI Xiang-Guo,XU Shu-Wei,XIE Yuan-Xiang,XING Ye-Bing,ZHENG Yong,LIU Min-Liang,SONG Li-Tao,XIE Cheng-Ying,,. β⁺/EC Decay and Systematic Analysis of^176,178Ir. Chinese Physics C, 2006, 30(S2): 177-179.
[7]	SHEN Shui-Fa,WANG Feng-Ge,PENG Nie,CHEN Heng-Gui,LU Hao,WU Yong-Peng. Signature Inversion in the Odd-Odd Nuclei with Mass A～80. Chinese Physics C, 2006, 30(12): 1234-1237.
[8]	ZHOU Wen-Ping,MA Ying-Jun,LU Jing-Bin,ZHAO Guang-Yi,WANG Shou-Yu,SUN Liang,YANG Dong,ZHAO Yan-Xin,LI Xian-Feng,LIU Yun-Zuo,ZHU Li-Hua,WU Xiao-Guang,CUI Xing,,. Signature Inversion in Weakly-Deformed Doubly-Odd¹⁵⁸Tm. Chinese Physics C, 2006, 30(10): 988-995.
[9]	WANG Hua-Lei,ZHANG Yu-Hu,ZHOU Xiao-Hong,GUO Ying-Xiang,LEI Xiang-Guo,XIE Yuan-Xiang,XU Shu-Wei,XING Ye-Bing,ZHENG Yong,LIU Min-Liang,XIE Cheng-Ying,SONG Li-Tao,,,,. β⁺/EC-Decay Study of¹⁷⁶Ir Neutron-Deficient Isotope. Chinese Physics C, 2006, 30(3): 201-206.
[10]	ZHU Sheng-Jiang,XIAO Shu-Dong,CHE Xing-Lai,YU Ying-Nan,LI Ming-Liang,CHEN Yong-Jing,ZHU Li-Hua,WEN Shu-Xian,WU Xiao-Guang,LI Guang-Sheng. Collective Dand Structures in Doubly Odd¹³⁶La Nucleus. Chinese Physics C, 2005, 29(11): 1047-1051.
[11]	ZHOU Xian-Rong,LONG Gui-Lu,LI Yan-Song. Beta Decay in¹⁷⁶Yb. Chinese Physics C, 2004, 28(S1): 69-71.
[12]	ZHOU Xiao-Hong,XIE Cheng-Ying,ZHANG Yu-Hu,GUO Ying-Xiang,LEI Xiang-Guo,ZHENG Yong,LIU Min-Liang,SONG Li-Tao,WANG Hua-Lei,YU Hai-Ping,LUO Peng,GUO Wen-Tao,,. Signature Inversion in the πh_9/2⊙νi_13/2Oblate Band of¹⁹⁰Tl. Chinese Physics C, 2004, 28(10): 1045-1049.
[13]	HE Chuang-Ye,WEN Shu-Xian,ZHU Li-Hua,WANG Zhi-Min,LI Guang-Sheng,MA Rui-Gang,WU Xiao-Guang,YUAN Guan-Jun,YANG Chun-Xiang,WANG Yue,ZHANG Zhen-Long,MENG Rui,,,. Signature Splitting and Inversion and Back Bending in Negative Sideband in⁸⁰Rb. Chinese Physics C, 2003, 27(9): 784-788.
[14]	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. Chinese Physics C, 2003, 27(4): 313-318.
[15]	DENG Fu-Guo,YANG Chun-Xiang,SUN Hui-Bin,WU Xiao-Guang,LU Jing-Bin,ZHAO Guang-Yi,HAN Guang-Bing,PENG Zhao-Hua,YIN Li-Chang,WEN Shu-Xian,LI Guang-Sheng,YUAN Guan-Ju,,,. Study on the High-Spin States and Signature Inversion of Odd-Odd Nucleus¹⁷⁰Ta. Chinese Physics C, 2002, 26(5): 491-500.
[16]	ZHANG Yu-Hu. Experimental Study of High-Spin States in Deformed Odd-Odd¹⁸⁰Ir. Chinese Physics C, 2002, 26(6): 582-588.
[17]	WU Chong-Shi. Signature Partners in Superdeformed¹⁴⁹Tb. Chinese Physics C, 2001, 25(3): 205-211.
[18]	ZHANG YuHu. Signature Inversion in the Rotational Bands of Odd-Odd¹⁷⁸Ir. Chinese Physics C, 2000, 24(12): 1123-1130.
[19]	Zhang Yuhu,Zhao Qingzhong,Zhou Xiaohong,Sun Xiangfu,Lei Xiangguo,Guo Yingxiang,Liu Zhong,Chen Xinfeng,Zhu Yongtai,Wen Shuxian,Yuan Guanjun,Liu Xiangan. High-Spin States in¹⁶²Lu and Signature lnversion of Yrast Bands in Doubly Odd Nuclei Around A=160 Mass Region. Chinese Physics C, 1997, 21(5): 393-401.
[20]	Zhang Yuhu,Zhao Qingzhong,Zhou Xiaohong Xu Hushan,Guo Yingxiang,Lei Xiangguo,Lu Jun,Zhu Shaofei,Gou Quanbu,Jin Hanjuan,Liu Zhong,Luo Yixiao,Sun Xiangfu,Zhu Yongtai,. Band Structure in Doubly Odd¹⁷⁰Ta. Chinese Physics C, 1997, 21(2): 187-191.

Access

Get Citation

ZHANG Yu-Hu, WEN Shu-Xian and ZHU Li-Hua. Signature Inversion Phenomena in the Rotational Bands of Odd-Odd ¹⁷⁶Ir[J]. Chinese Physics C, 2002, 26(5): 445-449.

ZHANG Yu-Hu, WEN Shu-Xian and ZHU Li-Hua. Signature Inversion Phenomena in the Rotational Bands of Odd-Odd ¹⁷⁶Ir[J]. Chinese Physics C, 2002, 26(5): 445-449. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2001-12-12
Revised: 1900-01-01

Article Metric

Article Views(4127)
PDF Downloads(539)
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

Signature Inversion Phenomena in the Rotational Bands of Odd-Odd¹⁷⁶Ir

Corresponding author:ZHANG Yu-Hu,

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China2 Japan Atomic Energy Research Institute,Tokai mura,Ibaraki 319-1195,Japan3 Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan4 Chiba University,Inage ku,Chiba 263-8512,Japan5 Department of Physics,Kyushu University,Fukuoka 812-81,Japan6 China Institute of Atomic Energy,Beijing 102413,China

Received Date:2001-12-12

Accepted Date:1900-01-01

Available Online:2002-05-05

Abstract:High spin states in¹⁷⁶Ir have been investigated via the¹⁴⁹Sm(³¹P,4nγ)¹⁷⁶Ir reaction through excitation functions, X-γ and γ-γ coincidence measurements. Four rotational bands have been identified for the first time and their configurations are suggested on the basis of the existing knowledge of band structures in odd-odd nuclei as well as the measured in-band B(M1)/B(E2) ratios. Among the four bands observed,the πh_9/2;νi_13/2and πi_13/2;νi_13/2bands exhibit an anomalous signature splitting. The signature inversion point is observed in the former at I_c=18 which is consistent with expectations;this signature inversion spin in the πi_13/2;νi_13/2band may be larger than 25h.

HTML

Reference (1)

Signature Inversion Phenomena in the Rotational Bands of Odd-Odd¹⁷⁶Ir

Abstract：

References

Access

Article Metrics

Metrics

通讯作者:陈斌, bchen63@163.com

Email This Article