Physics Letters B (Sep 2018)
Observation of β-delayed 2He emission from the proton-rich nucleus 22Al
- Y.T. Wang,
- D.Q. Fang,
- K. Wang,
- X.X. Xu,
- L.J. Sun,
- P.F. Bao,
- Z. Bai,
- X.G. Cao,
- Z.T. Dai,
- B. Ding,
- W.B. He,
- M.R. Huang,
- S.L. Jin,
- C.J. Lin,
- M. Lv,
- L.X. Liu,
- Y. Li,
- P. Ma,
- J.B. Ma,
- J.S. Wang,
- S.T. Wang,
- J.G. Wang,
- H.W. Wang,
- S.Q. Ye,
- Y.Y. Yang,
- C.L. Zhou,
- M.H. Zhao,
- H.Q. Zhang,
- Y.G. Ma,
- W.Q. Shen
Affiliations
- Y.T. Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; University of the Chinese Academy of Sciences, Beijing 100049, China
- D.Q. Fang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; Corresponding author.
- K. Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; University of the Chinese Academy of Sciences, Beijing 100049, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201203, China
- X.X. Xu
- China Institute of Atomic Energy, Beijing 102413, China
- L.J. Sun
- China Institute of Atomic Energy, Beijing 102413, China
- P.F. Bao
- China Institute of Atomic Energy, Beijing 102413, China
- Z. Bai
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- X.G. Cao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- Z.T. Dai
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- B. Ding
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- W.B. He
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- M.R. Huang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- S.L. Jin
- China Institute of Atomic Energy, Beijing 102413, China
- C.J. Lin
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- M. Lv
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- L.X. Liu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- Y. Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- P. Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- J.B. Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- J.S. Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- S.T. Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- J.G. Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- H.W. Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- S.Q. Ye
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- Y.Y. Yang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- C.L. Zhou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- M.H. Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- H.Q. Zhang
- China Institute of Atomic Energy, Beijing 102413, China
- Y.G. Ma
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201203, China
- W.Q. Shen
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201203, China
- Journal volume & issue
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Vol. 784
pp. 12 – 15
Abstract
The β-delayed two-proton emission from 22Al was investigated experimentally through the implantation-decay method. A β-delayed two-proton decay branch from 22Al were identified based on the coincidence of the charged particles and γ-ray signals. The relative momentum (qpp) and the opening angle (θpp) distributions of the two β-delayed protons are measured and a strong peak at qpp∼20MeV/c, as well as a peak at θpp∼30∘ are observed clearly. The β-delayed 2He emission from 22Al with a probability of 29 (13)% by fitting the experimental data with the results of Monte Carlo simulations.
