【摘要】 在质心参考系中研究了激光场中 1MeV质子对基态氢原子的碰撞电离过程 .靶原子的缀饰波函数由含时间微扰论给出 ,末道出射电子态用双中心Coulomb Volkov波函数描述 .计算表明辐射场使出射电子的双重微分截面变小 .敲出电子的能量越高 ,截面减小越明显 ,但截面中CTC峰的位置基本不受辐射场的影响更多还原

【Abstract】 The laser-assisted collisional ionization of atomic hydro ge n by 1 MeV fast proton is studied in the center-of-mass system. The dressed w avefunction of target is obtained by the time-dependent perturbation theory, and the state of ejected electron is described by a two-center Coulomb-Volko v wavefunction. It is shown that the double differential cross section (DDCS) i s lowered in the presence of a laser background. The higher the electron energy , the more the cross section is lowered. However, the position of CTC peak in the cross section remains unchanged.更多还原