Impact-parameter dependence of K-shell excitation in slow ion-atom collisions

Impact parameter dependence ofK-shell excitation probabilities in Ar ? Ar-collisions

“…2) shows that the minimum between the adiabatic and kinematic peaks is filled up to a certain extent. This has also been found in other experiments and was explained by direct 2p~r-excitation [4][5][6]. The charge state dependence, investigated in this experiment, provides more detailed information about this.…”

“…With decreasing impact parameter b, however, discrepancies arise, the expected minimmn between "adiabatic" and "kinematic" peak is partially filled and also the very high values of the K-shell-excitation probabilities PK(b) found in the region of the kinematic peak are not reproduced by the 2prc-2p~r rotational coupling model. These discrepancies have been explained by direct 2p~r and at very small b by direct lsa excitation [4][5][6]. Here "direct excitation" marks processes, where a 2pa electron is transferred to an * Supported by BMFT orbital lying higher than the 2prc orbital or to the continuum.…”

Systematic study of impact parameter dependent K-vacancy probabilities in near symmetric gas- and solid-target collision systems

“…The K-vacancy probability measured with gas target collision systems was found to be [5][6][7][8][9][10], in the region of the adiabatic peak, in good agreement with the shape of Prot(b). Exception to this being the results of Hagmann et al [11] who found strong deviations from Prot(b) for Cu+ Kr which are still not understood.…”

New calculations of P(b) curves for 1sσexcitation in low-Z (Z⩽10) ion-atom scattering

“…Letter to the Editor In addition, the difference between the results of this simple method and those from experiment (Luz et al 1979), even for these small-Z systems, shows definitely that more refined calculations are needed in order to understand the physical reason for the discrepancies.…”