(EC+β+) Decay of 133Sm and 1.1s Isomer of 133Pr

WANG Xu-Dong; XIE Yuan-Xiang; XU Shu-Wei; LI Zhan-Kui; GUO Bin; LENG Chang-Geng; WANG Chun-Fang; YU Yong

Chinese Physics C> 2002, Vol. 26> Issue(8) : 797-802

(EC+β⁺) Decay of ¹³³Sm and 1.1s Isomer of ¹³³Pr

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China

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Abstract：
By irradiation of an enriched target of ⁹⁶Ru with ⁴⁰Ca and using a helium-jet fast tape transport system in combination with X-γ and γ-γ coincidence measurements,the very neutron deficient isotope ¹³³Sm was produced and studied. A simple(EC+β⁺) decay scheme of Sm is proposed for the first time. A by product ¹³³Pr was produced simultaneously because of the ^98－102Ru contents of the ruthenium target. The half-life of an 11/2^－ low-lying isomeric state in ¹³³Pr has been measured to be (1.1±0.2)s. Using single-particle model,the reduced transition probabilities of the 11/2^－ isomers in ^{131,133,135,137}Pr are extracted from their experimental half-lives and compared with the Weisskopf estimate.

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WANG Xu-Dong, XIE Yuan-Xiang, XU Shu-Wei, LI Zhan-Kui, GUO Bin, LENG Chang-Geng, WANG Chun-Fang and YU Yong. (EC+β⁺) Decay of ¹³³Sm and 1.1s Isomer of ¹³³Pr[J]. Chinese Physics C, 2002, 26(8): 797-802.

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Received: 2001-10-26
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

(EC+β⁺) Decay of ¹³³Sm and 1.1s Isomer of ¹³³Pr

Corresponding author: WANG Xu-Dong,

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China

Received Date: 2001-10-26

Accepted Date: 1900-01-01

Available Online: 2002-08-05

Abstract: By irradiation of an enriched target of ⁹⁶Ru with ⁴⁰Ca and using a helium-jet fast tape transport system in combination with X-γ and γ-γ coincidence measurements,the very neutron deficient isotope ¹³³Sm was produced and studied. A simple(EC+β⁺) decay scheme of Sm is proposed for the first time. A by product ¹³³Pr was produced simultaneously because of the ^98－102Ru contents of the ruthenium target. The half-life of an 11/2^－ low-lying isomeric state in ¹³³Pr has been measured to be (1.1±0.2)s. Using single-particle model,the reduced transition probabilities of the 11/2^－ isomers in ^{131,133,135,137}Pr are extracted from their experimental half-lives and compared with the Weisskopf estimate.

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(EC+β⁺) Decay of ¹³³Sm and 1.1s Isomer of ¹³³Pr

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(EC+β⁺) Decay of ¹³³Sm and 1.1s Isomer of ¹³³Pr

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