Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2011, Vol. 22 ›› Issue (3): 151-155 doi: 10.13538/j.1001-8042/nst.22.151-155


Measuring energy loss of alpha particles in different vacuum conditions

CHENG Yi~1 TUO Xianguo~(1,2,*)HUANG Lianmei~1 LI Zhe~1 YANG Jianbo~1 ZHOU Chuanwen~1 SONG Qianqian~1   

  1. 1 Provincial Key Lab of Nuclear Techniques in Geosciences,Chengdu University of Technology,Chengdu 610059,China 2 State Key Lab of Geohazard Prevention and Geoenvironment Protection,Chengdu 610059,China
CHENG Yi, TUO Xianguo, HUANG Lianmei, LI Zhe, YANG Jianbo, ZHOU Chuanwen, SONG Qianqian. Measuring energy loss of alpha particles in different vacuum conditions.Nuclear Science and Techniques, 2011, 22(3): 151-155     doi: 10.13538/j.1001-8042/nst.22.151-155


In this paper,energy loss of alpha particles in different vacuum levels is studied experimentally and via theoretical analysis.A better understanding of energy loss of a particle in vacuum will help detect more exact numbers of alpha particles.Two ~(239)Pu sources are used to measure the energy loss of a particle crossing different vacuum levels (different air pressures).The experimental data are obtained from an instrument-PAM-100 developed by authors. The experimental results have shown that increasing vacuum levels will lead to more alpha residual energy but less energy loss.When the vacuum level reaches 0.04 MPa,alpha particles(~(239)Pu,5.115 MeV)will lose the energy of about 0.175 MeV with traversing 5 mm distance.Theoretical calculations have shown a good agreement with experimental results.This implies that the instrument has a high accuracy and could be applied in field work.

Key words: Vacuum level, Alpha particle, Energy loss, (239)Pu