New Results of β-delayed α Decay of <SUP>20</SUP>Na

Xu Xiaoji; Hu Zhiqiang; Guo Junsheng; Ma Ruichang; Liu Hongye; Luo Yixiao; Zhang Yuzhao; Guo Tianrui; Huang Wenxue; Xu Lianlian

Chinese Physics C> 1994, Vol. 18> Issue(8) : 680-686

New Results of β-delayed α Decay of ²⁰Na

Institute of Modern Physics, Academia Sinica,Lanzhou 730000

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Abstract：
The β-delayed α decay of ²⁰Na was restudied using neon target bombarded by 25 and 35.5 MeV protons.In this experiment a newly developed particle-telescope system including a gas ionization chamber as a thin ΔE detector was used. Two new peaks,one at 0.695 MeV and other at 0.907 MeV, were observed for the first time in the charged particle spectra. Based on particle identification, branching ratio and life time measurement,it is believed that these new peaks result from β-delayed low energy αdecay of ²⁰Na.The decay scheme and the low-lying level scheme of 20Na were thus revised.Its possible astrophysical implications were discussed.

References

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Xu Xiaoji, Hu Zhiqiang, Guo Junsheng, Ma Ruichang, Liu Hongye, Luo Yixiao, Zhang Yuzhao, Guo Tianrui, Huang Wenxue and Xu Lianlian. New Results of β-delayed α Decay of ²⁰Na[J]. Chinese Physics C, 1994, 18(8): 680-686.

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Received: 1900-01-01
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

New Results of β-delayed α Decay of ²⁰Na

Corresponding author: Xu Xiaoji,

Institute of Modern Physics, Academia Sinica,Lanzhou 730000

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1994-08-05

Abstract: The β-delayed α decay of ²⁰Na was restudied using neon target bombarded by 25 and 35.5 MeV protons.In this experiment a newly developed particle-telescope system including a gas ionization chamber as a thin ΔE detector was used. Two new peaks,one at 0.695 MeV and other at 0.907 MeV, were observed for the first time in the charged particle spectra. Based on particle identification, branching ratio and life time measurement,it is believed that these new peaks result from β-delayed low energy αdecay of ²⁰Na.The decay scheme and the low-lying level scheme of 20Na were thus revised.Its possible astrophysical implications were discussed.