Kinetics of diffusive ionisation of atoms

Abstract

The non-stationary equation of diffusion in energy space is solved when the initial binding energy of the atom is much smaller than the thermal energy k,T (collisional scattering) or atomic energy (interaction with a microwave field). As the result, analytic expressions for the diffusive ionisation rate of Rydberg atoms are obtained in the regime of their non-stationary generation.

Interaction of low-density 2DEG with acoustic phonons

“…These results are in good agreement with the theoretical prediction for the small-angle interaction between electrons and the piezoelectric potential of acoustic phonons (PA interaction) when the role of the screening is negligible [4,5]. Moreover, comparison of experimental values [3] of the parameter α 3 in equation ( 1) with those calculated theoretically [4] demonstrates a good quantitative agreement.…”

Kinetics of thermal diffusive ionization of Rydberg atoms

“…For electron-electron scattering the problem can be solved exactly for arbitrary values of initial binding energy 1 Eel. These calculations, given in the appendix, bridge the investigations of the lEol<< k,T case (Karpus 1988) with the l €, l >> k,T case, considered in the present paper.…”

“…In the z<< 1 region the eigenfunctions 'v, have the form (Karpus 1988 Here y=4'/s-1B(l/s-$,$) and k is the number of 'quantum levels' A.…”

“…The kinetics of diffusive ionization has been investigated theoretically when the initial binding energy of Rydberg atoms lEcl is much smaller than k B T (Karpus 1988). The present paper aims at considering the diffusive ionization kinetics in the opposite limiting case lEcl >> k,T.…”

“…For large initial energies of Rydberg atoms zG>> 1 (lEcl >> k.T), a decisive role in (A4) obtained in Karpus (1988) (cf (17) in Karpus (1988)).…”