Multi-electron transitions in Fq+-Ne and Naq+-Ne collisions

X. Cai; X. Chen; Z. Liu; Z. Shen; D. Yu; S. Wang; X. Ma

doi:10.1007/s100530050281

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2024 Impact factor 1.5

Atomic, Molecular, Optical and Plasma Physics

Eur. Phys. J. D 6, 23-28 (1999)
https://doi.org/10.1007/s100530050281

Multi-electron transitions in F^q+-Ne and Na^q+-Ne collisions^*

X. Cai¹^a, X. Chen², Z. Liu², Z. Shen², D. Yu¹, S. Wang¹ and X. Ma¹

¹ Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
² Department of Modern Physics, Lanzhou University, Lanzhou 730000, P.R. China

Corresponding author: ^a caixh@alpha.lzb.ac.cn

Received: 4 June 1998
Revised: 24 August 1998
Published online: 15 April 1999

Abstract

The ratios of the multiple ionization cross-section to those of the single ionization of neon are measured for 2.0-8.0 MeV ${\rm F}^{q+}$ and ${\rm Na}^{q+}$ (q = 2-5) ions bombardment. By means of the coincidence beween the charge state-selected scattered projectiles and recoil ions the contribution of the electron capture is separated from the total multiple ionization. A theoretical method is proposed to exclude the Auger transitions from the considered multiple ionization processes in the present work. The (q/v) dependence of the obtained ratios of the “pure” direct multiple ionization to those of the single ionization is discussed. The electronic structure dependence of the electron transition occurring in ion-neon collisions is studied and discussed for the symmetrical collision systems ${\rm F}^{q+}$ - ${\rm Ne}$ and ${\rm Na}^{q+}$ - $\rm Ne$ .