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Chin. Phys. B, 2014, Vol. 23(5): 053401    DOI: 10.1088/1674-1056/23/5/053401

Projectile electron loss in collisions of light charged ions with helium

Yin Yong-Zhi (尹永智)a, Wang Yun (王赟)b, Chen Xi-Meng (陈熙萌)a
a School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;
b Department of Radiation Protection, Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China
Abstract  We investigate the single-electron loss processes of light charged ions (Li1+,2+, C2+,3+,5+, and O2+,3+) in collisions with helium. To better understand the experimental results, we propose a theoretical model to calculate the cross section of projectile electron loss. In this model, an ionization radius of the incident ion was defined under the classical over-barrier model, and we developed “strings” to explain the processes of projectile electron loss, which is similar with the molecular over-barrier model. Theoretical calculations are in good agreement with the experimental results for the cross section of single-electron loss and the ratio of double-to-single ionization of helium associated with one-electron loss.
Keywords:  ion-atom collision      over-barrier model      electron loss  
Received:  26 August 2013      Revised:  15 November 2013      Accepted manuscript online: 
PACS:  34.50.Fa (Electronic excitation and ionization of atoms (including beam-foil excitation and ionization))  
  34.10.+x (General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.))  
Fund: Project supported by the Special Program for Key Basic Research of the Ministry of Science and Technology, China (Grant No. 2002CCA00900) and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. lzujbky-2013-5).
Corresponding Authors:  Chen Xi-Meng     E-mail:
About author:  34.50.Fa; 34.10.+x

Cite this article: 

Yin Yong-Zhi (尹永智), Wang Yun (王赟), Chen Xi-Meng (陈熙萌) Projectile electron loss in collisions of light charged ions with helium 2014 Chin. Phys. B 23 053401

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