Experimental Study of Level Structure in <SUP>207</SUP>Rn

LUO Wan-Ju; GUO Ying-Xiang; ZHOU Xiao-Hong; ZHANG Yu-Hu; LEI Xiang-Guo; LIU Zhong; HE Jian-Jun; ZHENG Yong; LIU Min-Liang; ZHU Li-Hua; WEN Shu-Xian

Chinese Physics C> 2003, Vol. 27> Issue(5) : 402-405

Experimental Study of Level Structure in ²⁰⁷Rn

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China2 China Institute of Atomic Energy,Beijing 102413,China

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Abstract：
High spin states of ²⁰⁷Rn have been investigated via the ¹⁹⁶Pt(¹⁶O,5n)²⁰⁷Rn reaction at ¹⁶O energies from 85 to 95 MeV using techniques of in beam γ-ray spectroscopy. The measurements of γ-ray excitation fuction,γ-ray spectra,γ-γ-t coincidences and decay γ ray spectra were performed with 10 BGO(AC)HPGe detectors.Based on these measurements,a level scheme of ²⁰⁷Rn with 17 γ rays is established. The spins for most of the levels in the scheme are proposed according to the results of measured γ-ray DCO ratios. Comparing the structure between ²⁰⁸Rn and ²⁰⁷ Rn, the low lying levels in ²⁰⁷Rn are interpreted by coupling a valence neutron hole (f _5/2) to the excited states in ²⁰⁸Rn core.

References

[1]

. Horn D,Baktash C,Lister C J et al.Phys.Rev.,1981,C24:2136 2. Triggs W J,Poletti A R,Dracoulis G D et al.Nucl.Phys.,1983,A395:2743. Dracoulis G D,Fahlander C,Box P O et al.Nucl.Phys.,1982,A380:335 4. Horn D,Hausser O,Faestermann T et al.Phys.Rev.Lett.,1977,V39:3895. Dracoulis G D,Byrne A P,Stuchbery A E et al.Nucl.Phys.,1987,A467:305 6. Poletti A R,Dracoulis G D,Fahlander C et al.Nucl.Phys.,1985,A440:118 7. Dracoulis G D,Fahlander C,Morrison I et al.Nucl.Phys.,1981,A359:180 8. Stuchbery A E,Dracoulis G D,Byrne A P et al.Nucl.Phys.,1988,A482:692 9. New man H,Novak J R,Beausang C W et al.Phys.Rev.,2001,C64:027304 10. Novak J R,Beausang C W,Amzal N et al.Phys.Rev.,1999,C59:R2989 11. Rezanka I,Ladenbayer-Bellis I M,Rasmussen J O et al.Phys.Rev.,1974,C10:766 12. ZHANG Y H,Hayakawa T,Oshima M et al.Phys.Rev.,2001,C65:01430213. Fant B,Herrlander C J,Honkanen K et al.Nucl.Phys.,1985,A441:11 14. ZHOU X H,GUO Y X,ZHU S F et al.HEP NP,2001,25(8):725(in Chinese)(周小红,郭应祥,朱少飞等.高能物理与核物理,2001,25(8):725)

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[2]	SHEN Shui-Fa , WANG Feng-Ge , FANG Ke-Ming , XU Fu-Rong . Study of Nuclear Level Structure in Tc Isotopes with Mass A～100. Chinese Physics C, 2007, 31(6): 543-547.
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[5]	WU Zhe-Ying , XU Fu-Rong . Octupole Deformation in Even-Even Rn-Th Nuclei. Chinese Physics C, 2006, 30(S2): 78-80.
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[9]	LI Jia-Xing , XIAO Guo-Qing , GUO Zhong-Yan , ZHAN Wen-Long , SUN ZHI-Yu , WANG Meng , WANG Jin-Chuan , HU Zheng-Guo , LI Chen , CHEN Li-Xin , MAO Rui-Shi . Experimental Study of the Exotic-Nuclei. Chinese Physics C, 2004, 28(12): 1256-1260.
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[11]	LUO Peng¹ , 2 , LIU Min-Liang¹ , LIU Zhong¹ , ZHANG Yu-Hu¹ , ZHOU Xiao-Hong¹ , GUO Ying-Xiang¹ , MA Ying-Jun³ , Y.Sasaki⁴ , K.Yamada⁴ , H.Ohshima⁴ , S.Yokose⁴ , M.Ishizuka⁴ , T.Komatsubara<sup . In-beam γ-Ray Spectroscopy of Level Structure in ¹³⁴Ba. Chinese Physics C, 2004, 28(3): 268-273.
[12]	ZHANG Yu-Hu , ZHOU Xiao-Hong . Experimental Study of High-Spin Band Structures in Odd-Odd ¹⁷²Re. Chinese Physics C, 2003, 27(7): 574-580.
[13]	XIE Cheng-Ying , ZHOU Xiao-Hong , ZHENG Yong , ZHANG Yu-Hu , LIU Zhong , PAN Qiang-Yan , GAN Zai-Guo . Study of Level Structure in ¹⁴⁶Tb. Chinese Physics C, 2003, 27(10): 884-887.
[14]	ZHOU Xiao-Hong , GUO Ying-Xiang , ZHU Shao-Fei , LEI Xiang-Guo , LIU Min-Liang , LIU Zhong , ZHANG Yu-Hu , HE Jian-Jun , ZHENG Yong , LUO Yi-Xiao . Level Structure in ²⁰⁹Fr. Chinese Physics C, 2001, 25(8): 725-730.
[15]	Yu Xiaohan , Shi Shuanghui , Gu Jiahui , Liu Jingyi , Li Wenxin , Zeng Jiping , Tian Jiaqi , Li Yan , Zhou Jianzhong . Low-lying Level Structure of ⁸³Rb. Chinese Physics C, 1998, 22(12): 1082-1091.
[16]	Zhang Changhua , Gu Jinnan . Structure of Nuclei in Lead Region (I) Spectra of ^207-210Tl and ^207,208Hg. Chinese Physics C, 1997, 21(S3): 71-78.
[17]	Zhang Changhua , Gu Jinnan . Nuclear Structure in Lead Region(I) Energy Spectra and Wavefunctions of ^207—210T1 and ^207,208Hg. Chinese Physics C, 1997, 21(8): 734-739.
[18]	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.
[19]	Zhou Xiaohong , Sun Xiangfu , Lei Xiangguo , Jin Hanjuan , Liu Zhong , Zhang Yuhu , Pan Qiangyan , Guo Yingxiang , Chen Xinfeng , Luo Yixiao , Wen Shuxian , Yuan Guanjun , Li Guangsheng , Yang Chunxiang . Study of Low-lying Level Structure in ¹⁹⁸Pb. Chinese Physics C, 1994, 18(S1): 28-32.
[20]	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.

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LUO Wan-Ju, GUO Ying-Xiang, ZHOU Xiao-Hong, ZHANG Yu-Hu, LEI Xiang-Guo, LIU Zhong, HE Jian-Jun, ZHENG Yong, LIU Min-Liang, ZHU Li-Hua and WEN Shu-Xian. Experimental Study of Level Structure in ²⁰⁷Rn[J]. Chinese Physics C, 2003, 27(5): 402-405.

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Received: 2002-06-13
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Experimental Study of Level Structure in ²⁰⁷Rn

Corresponding author: LUO Wan-Ju,

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China2 China Institute of Atomic Energy,Beijing 102413,China

Received Date: 2002-06-13

Accepted Date: 1900-01-01

Available Online: 2003-05-05

Abstract: High spin states of ²⁰⁷Rn have been investigated via the ¹⁹⁶Pt(¹⁶O,5n)²⁰⁷Rn reaction at ¹⁶O energies from 85 to 95 MeV using techniques of in beam γ-ray spectroscopy. The measurements of γ-ray excitation fuction,γ-ray spectra,γ-γ-t coincidences and decay γ ray spectra were performed with 10 BGO(AC)HPGe detectors.Based on these measurements,a level scheme of ²⁰⁷Rn with 17 γ rays is established. The spins for most of the levels in the scheme are proposed according to the results of measured γ-ray DCO ratios. Comparing the structure between ²⁰⁸Rn and ²⁰⁷ Rn, the low lying levels in ²⁰⁷Rn are interpreted by coupling a valence neutron hole (f _5/2) to the excited states in ²⁰⁸Rn core.

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Experimental Study of Level Structure in 207Rn

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Experimental Study of Level Structure in 207Rn

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Experimental Study of Level Structure in ²⁰⁷Rn

Experimental Study of Level Structure in ²⁰⁷Rn