摘要
The cross sections for neutralization and detachment in H^＋-H^- collisions in the energy range from 1.0 to lOO keV/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. [3. 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.
The cross sections for neutralization and detachment in H^＋-H^- collisions in the energy range from 1.0 to lOO keV/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. [3. 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.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 10574018 and 10574020. the Science and Technology Foundation of Chinese Academy of Engineering Physics, and National High-Technology ICF Committee of China.
