Theoretical Investigation on Excitation, Ionization and Capture in H（1s, 2s） ＋ H（1s, 2s） Collisions  

作　　者：陈兰芳 朱小龙 马新文 刘玲 何斌 王建国 Ratko JANEV 

机构地区：[1]Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 [2]Graduate School of Chinese Academy of Sciences, Beijing 100049 [3]Institute of Applied Physics and Computational Mathematics, Beijing 100088 [4]Macedonian Academy of Sciences and Arts, PO Box 428, 1000 Skopje, Macedonia

出　　处：《Chinese Physics Letters》2008年第8期2849-2852,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10434100, 10574018 and 10574020.

摘　　要：Cross sections of electron-loss in H（1s）＋ H（1s） collisions and total collisional destruction of H（2s） in H（1s） 4- H（2s） collisions are calculatted by four-body classical-trajectory Monte Caylo （CTMC） method and compared with previous theoretical and experimental data over the energy range of 4-100 keV. For the former a good agreement is obtained within different four-body CTMC calculations, and for the incident energy Ep 〉 10 keV, comparison with the experimental data shows a better agreement than the results calculated by the impact parameter approx- imation. For the latter, our theory predicts the correct experimental behaviour, and the discrepancies between our results and experimental ones are less than 30%. Based on the successive comparison with experiments, the cross sections for excitation to H（2p）, single- and double-ionization and H- formation in H（2s）＋H（2s） collisions are calculated in the energy range of 4-100 keV for the first time, and compared with those in H（1s）＋H（1s） and H（1s）＋U（2s） collisions.Cross sections of electron-loss in H（1s）＋ H（1s） collisions and total collisional destruction of H（2s） in H（1s） 4- H（2s） collisions are calculatted by four-body classical-trajectory Monte Caylo （CTMC） method and compared with previous theoretical and experimental data over the energy range of 4-100 keV. For the former a good agreement is obtained within different four-body CTMC calculations, and for the incident energy Ep 〉 10 keV, comparison with the experimental data shows a better agreement than the results calculated by the impact parameter approx- imation. For the latter, our theory predicts the correct experimental behaviour, and the discrepancies between our results and experimental ones are less than 30%. Based on the successive comparison with experiments, the cross sections for excitation to H（2p）, single- and double-ionization and H- formation in H（2s）＋H（2s） collisions are calculated in the energy range of 4-100 keV for the first time, and compared with those in H（1s）＋H（1s） and H（1s）＋U（2s） collisions.

关 键 词：FAST HYDROGEN-ATOMS H-H COLLISIONS CROSS-SECTIONS CHARGE-TRANSFER H(1S)-H(1S) COLLISIONS MOLECULAR-HYDROGEN ELECTRON-CAPTURE IMPACT MULTIELECTRON 

分 类 号：O56[理学—原子与分子物理]