State-selective electron capture in -Li(2s) collisions for impact energies from 0.1 to 1.5 keV amu

Abstract

The 8 -and 9 -distributions of the Kr 7+ -excited states resulting from single-electron capture in Kr 8+ -Li(2s) collisions are determined experimentally for collision energies from 0.1 to 1.0 keV amu −1 . The experimental σ (n ) cross sections are deduced from emission cross sections obtained by means of near ultraviolet and visible photon spectroscopy. In addition, a complete theoretical study of these distributions has been made using the classical trajectory Monte Carlo (CTMC) method for a larger energy domain (0.1-5.0 keV amu −1 ). The theoretical and experimental results are, on the whole, in fair agreement. The results are discussed in terms of dynamical couplings involved in state-selective electron capture from an analysis of electronic energy curves calculated for the Kr 7+ + Li + system.

State selective single-electron capture in O6++ Na collisions

“…Experimental work on collisions between alkali atoms and highly charged ions (q 1) to obtain state-selective cross sections has been mainly done by means of photon emission spectroscopy (PES) in which usually only a few (major) capture channels are studied [9][10][11][12][13][14][15][16][17][18]. On the theory side the problem has mainly been addressed by means of classical trajectory Monte Carlo calculations (CTMC) [13][14][15][16][17][18][19][20][21], which do not suffer from basis set size limitations. Close-coupling atomic orbital calculations have only been performed for A q+ -Li (q = 2-6) [22].…”