Chinese Physics C > 2000, Vol. 24 > Issue(4): 359-363

Investigation of the [лh_9/2vi_13/2^－1] 10^－Isomer in²⁰⁶At

Institute of Modern Physics, The Chinese Academy of Sciences,Lanzhou 73000, China2 China Institute of Atomic Energy,Beijing 102413, China

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Abstract：
The high-spin states of ²⁰⁶At have been studied in the ¹⁹⁷An ( ¹²C, 3n) ²⁰⁶At reaction at ¹²C energies from 60 to 80 MeV using technique of in-beam γ-ray spectroscopy. Measurements of Tray excitation functions, γ-γ-t coincidences, and y-ray angular distributions were performed. A level scheme for ²⁰⁶At, including a 10 ^－isomer with a measured half-life of 908±400 ns, was established for the first the. The characteristics of the 10 ^－isomers in doubly edd ²⁰⁶At nuclei were stressed.

References

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Fact B et al. Nucl. Phys., 1984, A429: 296–3112 Rahkonen V et al. Z. Phys., 1978, A284:357–369 3 Davie R F et al. Nucl. Phys., 1984, A430:454–484 4 ZHOU Z X et al. Phys. Rev., 1996, C54:2948–2953 5 Lonroth T et al. Phys. r., 1981, 23:774–7786 Wapstra et al. Nucl. Phys., 1985, A432:1–13 7 Schiffer J R et al. Mod. Phys., 1976, 48:278–284

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FENG XiChen, GUO YingXiang, ZHOU XiaoHong, LEI XiangGuo, HUANG WenXue, HE JianJun, ZHU ShaoFei, LIU Zhong, ZHANG YuHu, LUO YiXiao, WEN ShuXian, YUAN GuanJun and WU XiaoGua. Investigation of the [лh _9/2vi _13/2 ^－1] 10 ^－Isomer in ²⁰⁶At[J]. Chinese Physics C, 2000, 24(4): 359-363.

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Received: 1999-10-27
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Investigation of the [лh_9/2vi_13/2^－1] 10^－Isomer in²⁰⁶At

Corresponding author:FENG XiChen,

Institute of Modern Physics, The Chinese Academy of Sciences,Lanzhou 73000, China2 China Institute of Atomic Energy,Beijing 102413, China

Received Date:1999-10-27
Accepted Date:1900-01-01
Available Online:2000-04-05

Abstract:The high-spin states of²⁰⁶At have been studied in the¹⁹⁷An (¹²C, 3n)²⁰⁶At reaction at¹²C energies from 60 to 80 MeV using technique of in-beam γ-ray spectroscopy. Measurements of Tray excitation functions, γ-γ-t coincidences, and y-ray angular distributions were performed. A level scheme for²⁰⁶At, including a 10^－isomer with a measured half-life of 908±400 ns, was established for the first the. The characteristics of the 10^－isomers in doubly edd²⁰⁶At nuclei were stressed.