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

Experimental Study of Level Structure in²⁰⁷Rn

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 ²⁰⁷Rn, 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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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 in²⁰⁷Rn

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 of²⁰⁷Rn have been investigated via the¹⁹⁶Pt(¹⁶O,5n)²⁰⁷Rn reaction at¹⁶O 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 of²⁰⁷Rn 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 between²⁰⁸Rn and²⁰⁷Rn, the low lying levels in²⁰⁷Rn are interpreted by coupling a valence neutron hole (f_5/2) to the excited states in²⁰⁸Rn core.

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Experimental Study of Level Structure in²⁰⁷Rn

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