Further Research on Level Structures of Neutron-Rich Odd-A Ru Nuclei

ZHU Sheng-Jiang; ZHANG Zheng; XIAO Shu-Dong; CHE Xing-Lai; U Yong-Nan; LI Ming-Liang; ZHENG Ran-Cheng

Chinese Physics C> 2005, Vol. 29> Issue(1) : 23-27

Further Research on Level Structures of Neutron-Rich Odd-A Ru Nuclei

Department of Physics,Tsinghua University,Beijing 100084,China2 Department of Physics,Vanderbilt University,Nashville,TN 37235,USA3 Lawrence Berkeley National Laboratory,Berkeley,CA 94720,USA4 Department of Physics,Mississippi State University,MS 39762,USA

Abstract
HTML
Reference
Related

PDF

Abstract：
Through analyzing the data with high statistics from measuring high–fold prompt γ–ray coincidence events following the spontaneous fission of ²⁵²Cf with the Gammasphere detector array,the level schemes in neutron–rich odd–A ^109,111Ru nuclei have been extended up to higher spin states.Based on the data analysis of the coincidence matrices with different delay times,the life times for many low excited levels have been obtained in ^{107,109,111,113}Ru nuclei,among them,the 96.4 keV level in ¹⁰⁹Ru is an isomer with life time value 1300ns.It is shows that the observed backbending in the yrast band of the neighboring even-even ¹¹⁰Ru is indeed originated from the alignment of a pair of neutrons through analyzing the moments of inertia J⁽¹⁾vs.rotational frequencies hω of the observed collective bands in ^107,109Ru nuclei.Triaxial rotor plus particle model has been employed to calculate some levels of the collective bands as well as the B(M1)/B(E2) values.The calculated results basically accord with the experimental ones.

References

[1]

. ZHU S J, GAN C Y, Hamilton J H et al. Chin. Phys. Lett . , 1998,15: 7932. Hwang J K, Ramayya A V, Hamilton J H et al . J. Phys. , 1998,G24: L93. ZHU S J, Hamilton JH, Ramayya A V et al. Phys. Rev. , 2001, C65:0143074. ZHU Sheng-Jiang, XU Rui-Qing, Hamilton J H et al . High EnergyPhys. and Nucl. Phys. , 2002, 26: 791 5. Fot iades N, Cizewski J A, Krücken R et al. Phys. Rev. , 2000, C61:0643266. ZHANG Z, ZHU S J, Hamilton J H et al. Phys. Rev. , 2003, C67:0643077. ZHANG Zheng, ZHU Sheng-Jiang, Hamilt on J H et al. High EnergyPhys. and Nucl. Phys. , 2003, 27: 688 8. Hamilton J H, Ramayya A V, ZHU S J et al. Prog. Part. Nucl.Phys. , 1995, 35: 6359. ZHU S J, LU Q H, Hamilton J H et al. Phys. Lett . , 1995, B357:27310. ZHU S J, Hamilton J H, Ramayya A V et al. Phys. Rev. , 1999,C59: 131611. Radford D C.Nucl. Instrum. Methods Phys. Res. , 1995, A361: 29712. Aryaeinejad R, Cole J D, Greenwood R C et al. Phys. Rev. , 1993,C48: 56613. XIAO Shu-Dong, ZHU Sheng-Jiang, Hamilton J H et al. High Energy Phys. and Nucl. Phys. , 2004, 28: 3714. JIANG Z, ZHU S J, Hamilton JH et al. Chin. Phys. Lett . , 2003, 20:35015. XING Zheng, CHEN Xing-Qu, XU Shu-Wei. High Energy Phys. and Nucl . Phys. , 1996, 20: 8516. LU Q H, Butler-Moore K, ZHU S J et al. Phys. Rev. , 1995, C52:1348

[1]	Fan Ying , REN Zhong-Zhou . Theoretical Studies on Electron Scattering of S and Si Isotopes. Chinese Physics C, 2006, 30(10): 983-987.
[2]	CHE Xing-Lai , ZHU Sheng-Jiang , CHEN Yong-Jing , DING Huai-Bo , LI Ming-Liang . High Spin Band Structure in ¹¹²Ru. Chinese Physics C, 2006, 30(S2): 154-156.
[3]	XU Shu-Wei , XIE Yuan-Xiang , XU Fu-Rong , LI Zhan-Kui , WANG Xu-Dong , XING Ye-Bing . Further Identification of the Decay of ¹²⁹Pm Near the Proton Drip Line. Chinese Physics C, 2005, 29(3): 237-239.
[4]	CHE Xing-Lai , ZHU Sheng-Jiang , LI Ming-Liang , YU Yong-Nan . Identification of Collective Bands in Neutron-Rich ¹⁰⁸Ru Nucleus. Chinese Physics C, 2004, 28(S1): 56-58.
[5]	ZHANG Zheng , ZHU Sheng-Jiang , XU Rui-Qing , JIANG Zhuo , XIAO Shu-Dong . Identification of Collective Bands in Neutron-Rich ¹¹³Ru Nucleus. Chinese Physics C, 2003, 27(8): 688-691.
[6]	ZHU Sheng-Jiang , XU Rui-Qing , ZHANG Zheng , JIANG Zhuo , GAN Cui-Yun . Collective Bands in Neutron-Rich ¹⁰⁷Ru Nucleus. Chinese Physics C, 2002, 26(8): 791-796.
[7]	DU Dong-Sheng , YANG De-Shan , ZHU Guo-Huai . Further Analysis of Di-gluon Fusion Mechanismfor the Decays of B→Kη′. Chinese Physics C, 2002, 26(1): 1-7.
[8]	ZHU ShengJiang , GAN CuiYun , ZHU LingYan , YANG LiMing , XU RuiQing , JON MyonGil , JIANG Zhuo , ZHANG Zheng , . Collective Band Structures in Neutron-Rich Odd-A ^145,147Ce Nuclei. Chinese Physics C, 2000, 24(11): 1018-1023.
[9]	Fang Keming , Liu Jingyi , Shi Shuanghui , Gu Jiahui , Zeng Jiping , Yu Xiaohan , Shen Shuifa , Li Yan . Decay of ⁹⁵Ru. Chinese Physics C, 1999, 23(8): 820-827.
[10]	Zhou Xiaohong , Sun Xiangfu , Guo Yingxiang , Lei Xiangguo , Liu Zhong , Chen Xinfeng , Zhang Yuhu , Jin Hanjuan , Luo Yixiao , Wen Shuxian , Yuan Guanjun , Li Guangsheng , Yang Chunxiang . Study of Excited States in Neutron-Deficient ¹⁹⁷Bi. Chinese Physics C, 1995, 19(11): 961-967.
[11]	Chen Jianhua , Kuang Huisun , Bai Mingfu , Cheng Xiangai . Further Classification of JT Coupled States for Nucleons by Casimir Operator of R(5) Group. Chinese Physics C, 1995, 19(5): 424-430.
[12]	Ren Zhongzhou . Further Studies on Halo Nuclei ¹¹Li,¹⁴Be and ¹⁷B. Chinese Physics C, 1995, 19(6): 562-566.
[13]	Huang Liangxin , Li Hong , Chen Tianlun . Further Study on SU(2)×SU(2) Lattice Chiral Model. Chinese Physics C, 1995, 19(3): 245-250.
[14]	Mao Huishun , Shi Huanzhang , Liu Nianzong , Zhang Zhuxiang , Zhang Caidi , Zheng Linsheng , Zhou Yongshen , Hu Lidong , Zhao Xiaojian , Zhong Xuechu , Tan Yiping , Han Shiwen . Further Study of Radiation Damage of Tile/Fiber Scintillator Calorimeter. Chinese Physics C, 1994, 18(10): 870-878.
[15]	ZHU Sheng-Jiang . Research on Level Structures of Neutron-Rich Nuclei and Shape Phase Transitions Around A～100 and 150 Regions. Chinese Physics C, 1993, 17(4): 353-361.
[16]	ZHAO Xuan , ZENG Fan-An , LING You-Guang . A FURTHER STUDY OF QUASI RESONATING GROUP METHOD—— ANALYSIS OF p+⁶Li ELASTIC SCATTERING. Chinese Physics C, 1990, 14(1): 85-91.
[17]	WANG Zheng-Da . A FURTHER EXPLORATION FOR MECHANISM OF ANGULAR MOMENTUM TRANSFER IN HEAVY ION REACTION. Chinese Physics C, 1984, 8(5): 596-601.
[18]	WANG KE-LIN , BAO XI-MING , LIU ZU-WEI , CHEN LIN . THE FURTHER DISCUSSION OF GAUGE HIERARCHY. Chinese Physics C, 1981, 5(6): 744-750.
[19]	Jin Bing-nian , Lu Zhong-dao , Chen Xing-qu , Wang Shun-jin . THE SEMI-EMPIRICAL ANALYSIS OF NUCLEAR LEVEL DENSITIES. Chinese Physics C, 1980, 4(2): 236-240.
[20]	GAO LUN . FURTHER DISCUSSION ON THE EQUATION AND ITS SOLUTIONS FOR THE BOUND STATES OF MESONS. Chinese Physics C, 1978, 2(3): 211-224.

Access

Get Citation

ZHU Sheng-Jiang, ZHANG Zheng, XIAO Shu-Dong, CHE Xing-Lai, U Yong-Nan, LI Ming-Liang and ZHENG Ran-Cheng. Further Research on Level Structures of Neutron-Rich Odd-A Ru Nuclei[J]. Chinese Physics C, 2005, 29(1): 23-27.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2004-05-14
Revised: 1900-01-01

Article Metric

Article Views(3201)
PDF Downloads(620)
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

Further Research on Level Structures of Neutron-Rich Odd-A Ru Nuclei

Corresponding author: ZHU Sheng-Jiang,

Department of Physics,Tsinghua University,Beijing 100084,China2 Department of Physics,Vanderbilt University,Nashville,TN 37235,USA3 Lawrence Berkeley National Laboratory,Berkeley,CA 94720,USA4 Department of Physics,Mississippi State University,MS 39762,USA

Received Date: 2004-05-14

Accepted Date: 1900-01-01

Available Online: 2005-01-05

Abstract: Through analyzing the data with high statistics from measuring high–fold prompt γ–ray coincidence events following the spontaneous fission of ²⁵²Cf with the Gammasphere detector array,the level schemes in neutron–rich odd–A ^109,111Ru nuclei have been extended up to higher spin states.Based on the data analysis of the coincidence matrices with different delay times,the life times for many low excited levels have been obtained in ^{107,109,111,113}Ru nuclei,among them,the 96.4 keV level in ¹⁰⁹Ru is an isomer with life time value 1300ns.It is shows that the observed backbending in the yrast band of the neighboring even-even ¹¹⁰Ru is indeed originated from the alignment of a pair of neutrons through analyzing the moments of inertia J⁽¹⁾vs.rotational frequencies hω of the observed collective bands in ^107,109Ru nuclei.Triaxial rotor plus particle model has been employed to calculate some levels of the collective bands as well as the B(M1)/B(E2) values.The calculated results basically accord with the experimental ones.

HTML

Reference (1)

Further Research on Level Structures of Neutron-Rich Odd-A Ru Nuclei

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article