Chinese Physics C > 1997, Vol. 21 > Issue(4): 289-291

First Study of Weak (EC+β⁺) Decay Branch for the Neutron-Deficient Isotoep²⁰⁹Fr

Institute of Modern Physics,The Chinese Acadeny of Sciences,Lanzhou 730000

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Abstract：
²⁰⁹Fr has been produced by irradiation of ¹⁹⁷Au with ¹⁶O from SFC accelarator uia the fusion-evaporation 4n channel.The(EC+β ⁺)decay of ²⁰⁹Fr has been studied by a He-jet tape transport system.The decay scheme is proposed for the first time based on γ-t,X-γ-t,γ-γ-t coincidece and γ-γ delay coincidence measurements,which takes account of 20 observed γ ray.Five members of low-lying states in ²⁰⁹Rn can be explained by the multi-plet [( ²¹⁰Rn2 ⁺)(νf _5/2) ^－1].The branching ratio for(EC+β ⁺) decay of ²⁰⁹Fr has been estimated experimentaly to be(3.0±1.5)%.

References

[1]

P.Hornshoj et al.,Nucl.Phys.,A 230（1974）380.[2]M.J.Martin,Nucl.Data Sheets,63（1991）723.[3]G.Audi A.H.Wapstra,Nucl.Phys.,A565（1993）1.[4]D.G.Raich et al,Z.Phys.,A279（1976）301.[5]A.R.Poletti et al.Nucl.Phys.,A440（1985）118.[6]V.G.Chumin et al.,Izv.Akad.Nauk SSSR Ser.Fiz.,45（1981）2102.[7]M.R.Schmorak,Nucl.Data Sheets,45（1985）145.[8]S.Baba et al.,Z.Phys.,A331（1988）33.[9]M.J.Martin,Nucl.Date Sheets,47（1986）950.

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Xie Yuanxiang, Xu Shuwei, Guo Yingxiang, Ma Ruichang, Ge Yuanxiu, Li Zhankui, Wang Chunfang, Guo Bin, Xing Jianping, Zhang Tianmei, Zhu Shaofei and Xu Wang. First Study of Weak (EC+β ⁺) Decay Branch for the Neutron-Deficient Isotoep ²⁰⁹Fr[J]. Chinese Physics C, 1997, 21(4): 289-291.

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Received: 1900-01-01
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

First Study of Weak (EC+β⁺) Decay Branch for the Neutron-Deficient Isotoep²⁰⁹Fr

Corresponding author:Xie Yuanxiang,

Institute of Modern Physics,The Chinese Acadeny of Sciences,Lanzhou 730000

Received Date:1900-01-01

Accepted Date:1900-01-01

Available Online:1997-04-05

Abstract:²⁰⁹Fr has been produced by irradiation of¹⁹⁷Au with¹⁶O from SFC accelarator uia the fusion-evaporation 4n channel.The(EC+β⁺)decay of²⁰⁹Fr has been studied by a He-jet tape transport system.The decay scheme is proposed for the first time based on γ-t,X-γ-t,γ-γ-t coincidece and γ-γ delay coincidence measurements,which takes account of 20 observed γ ray.Five members of low-lying states in²⁰⁹Rn can be explained by the multi-plet [(²¹⁰Rn2⁺)(νf_5/2)^－1].The branching ratio for(EC+β⁺) decay of²⁰⁹Fr has been estimated experimentaly to be(3.0±1.5)%.

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First Study of Weak (EC+β⁺) Decay Branch for the Neutron-Deficient Isotoep²⁰⁹Fr

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