Classical phase-space distributions for atomic hydrogen collisions

Calculation of ionization and total and partial charge exchange cross sections for collisions of C6+ and N7+ with H

“…Several works [22,44,45,29] have suggested alternative initial distributions, where the radial distribution fits the quantal one. In this respect, the study of reference [29], showed that all these distributions yield practically identical results.…”

The Coulomb four-body problem in a classical framework: triple photoionization of lithium

“…This implies classical propagation of the Coulomb four-body problem using the classical trajectory Monte Carlo (CTMC) phase space method. CTMC has often been used to describe break-up processes induced by particle impact [6][7][8][9] with implementations differing usually in the way the phase space distribution of the initial state is constructed. We use a Wigner transform of the initial quantum wave function for the initial state, and this is why we call our approach "quasi"-classical.…”

Comment on “Classical description ofH(1s)andH*(n=2)for cross-secti

“…for H(1s)]. Several authors [4][5][6], have suggested the use of improved initial distributions, which approximately fit both momentum and position quantal densities. It was found [7] that all these alternatives lead to practically identical electron capture cross sections.…”

“…These conditions permit one to divide the phase space into adjacent nonoverlaping bins associated to the quantum numbers n,l. In practice, the use of the HED and other continuum distributions [5,6] improves the total cross sections with respect to the microcanonical calculation for electron capture and ionization processes, and n-partial electron capture cross sections for relatively large n (see [7]). …”