Eur. Phys. J. D 2, 237-243 (1998)
https://doi.org/10.1007/s100530050136

Dressing modification in the laser-assisted proton-helium charge exchange collision

¹ Chinese Center of Advanced Science and Technology (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China
² Department of Modern Physics, University of Science and Technology of China, P.O. Box 4, Hefei, Anhui 230027, P.R. China
³ Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong

Corresponding author: ^a lism@lx04.mphy.ustc.edu.cn

Received: 9 April 1997
Revised: 25 November 1997
Revised: 24 September 1997
Accepted: 5 February 1998
Published online: 15 June 1998

Abstract

A first Born approach to intense laser modified proton-helium electron capture collision is given. Theoretical results show that the angular distribution peaks forward sharply. For a geometry of laser polarization vector parallel to the incident direction, the dressing effect on the differential cross section covers a relatively wide angular range; while for a perpendicular geometry, the result is modified only in a very small angular region. The integral cross sections get highly promoted by laser with the impact energy increasing. The modified cross sections are increasing functions of field strength, but decreasing functions of field frequency. Comparisons with the laser assisted electron capture from atomic hydrogen are made.