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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

  • 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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    [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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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.
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. shu
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Received: 2002-06-13
Revised: 1900-01-01
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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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