Our previous work on the classical over-barrier ionization model for helium double ionization is extended to the complex multi-electron system of Ne. The total and q-fold ionization cross sections are calculated at en...Our previous work on the classical over-barrier ionization model for helium double ionization is extended to the complex multi-electron system of Ne. The total and q-fold ionization cross sections are calculated at energies ranging from a few tens to several hundred keV/u. The calculation results are in good agreement with the experimental data, and the energy dependence of the cross sections suggests that the multi-ionization of a strong perturbated complex atom is probably the sequential over-barrier ionization process.展开更多
The values of cross-section ratio Rkl of direct k-fold ionization cross section （σk） to direct single ionization cross section （σ1） of Ne impacted by Cq＋ （q = 1-3） ions in an energy range of 10 keV/u-500 keV/...The values of cross-section ratio Rkl of direct k-fold ionization cross section （σk） to direct single ionization cross section （σ1） of Ne impacted by Cq＋ （q = 1-3） ions in an energy range of 10 keV/u-500 keV/u are measured in this work. The experimental data are compared with the results from our multi-electron classical over-barrier ionization （ME-COBI） model, showing that the model can give a good estimate to the experimental data.展开更多
We investigate the single-electron loss processes of light charged ions （Li^1＋,2＋, C^2＋,3＋,5＋, and O^2＋,3＋） in collisions with helium. To better understand the experimental results, we propose a theoretical m...We investigate the single-electron loss processes of light charged ions （Li^1＋,2＋, C^2＋,3＋,5＋, and O^2＋,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.展开更多
基金Project supported the by the National Natural Science Foundation of China (Grant No. 10804039)the Fundamental Research Funds for the Central Universities,China (Grant No. lzujbky-2009-24)
文摘Our previous work on the classical over-barrier ionization model for helium double ionization is extended to the complex multi-electron system of Ne. The total and q-fold ionization cross sections are calculated at energies ranging from a few tens to several hundred keV/u. The calculation results are in good agreement with the experimental data, and the energy dependence of the cross sections suggests that the multi-ionization of a strong perturbated complex atom is probably the sequential over-barrier ionization process.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11174116 and 11175075)
文摘The values of cross-section ratio Rkl of direct k-fold ionization cross section （σk） to direct single ionization cross section （σ1） of Ne impacted by Cq＋ （q = 1-3） ions in an energy range of 10 keV/u-500 keV/u are measured in this work. The experimental data are compared with the results from our multi-electron classical over-barrier ionization （ME-COBI） model, showing that the model can give a good estimate to the experimental data.
基金Project supported by the Special Program for Key Basic Research of the Ministry of Science and Technology,China(Grant No.2002CCA00900)the Fundamental Research Funds for the Central Universities of Ministry of Education of China(Grant No.lzujbky-2013-5)
文摘We investigate the single-electron loss processes of light charged ions （Li^1＋,2＋, C^2＋,3＋,5＋, and O^2＋,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.
