Chin. Phys. Lett.  2007, Vol. 24 Issue (11): 3115-3118    DOI:
Original Articles |
Neutralization and Detachment in H+--H- Collisions
LIU Ling;WANG Jian-Guo
The Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088
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LIU Ling, WANG Jian-Guo 2007 Chin. Phys. Lett. 24 3115-3118
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Abstract The cross sections for neutralization and detachment in H+--H- collisions in the energy range from 1.0 to 100keV/u are calculated using the two-centre atomic orbital close-coupling (TC-AOCC) method. The results are compared with the available experimental and theoretical data. It is found that the
neutralization cross section agrees well with the experimental data by Schon et al. [J. Phys. B 20 (1987) L759] and Melchert et al., [J. Phys. B 32 (1999) L139] especially at low energies. However, for the detachment process, our calculated cross section lies between the experimental data by Melchert et al. and by Peart et al. [J. Phys. B 9 (1976) 3047] for the energy below 15keV/u. Above this energy, our result is smaller than the two experimental data. It is worth pointing out that there exists a large difference between these two experimental data and it is difficult to judge which data is more accurate.
Therefore, a high-precision measurement for detachment cross sections is expected to resolve this discrepancy and to test the theoretical calculations.
Keywords: 34.70.+e      34.50.Fa     
Received: 07 June 2007      Published: 23 October 2007
PACS:  34.70.+e (Charge transfer)  
  34.50.Fa (Electronic excitation and ionization of atoms (including beam-foil excitation and ionization))  
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LIU Ling
WANG Jian-Guo
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