Nucleus–Nucleus Effects in Fully Differential Cross Sections for Energetic C ⁶⁺ +He Collisions with Small Momentum Transfer

Abstract

The modified Coulomb-Born approximation with and without the internuclear interaction (MCB-NN and MCB) is used to calculate the fully differential cross sections (FDCS) for the single ionization of helium by 100 MeV/amu C 6+ impact. The effects of the internuclear interaction on the FDCS are examined in geometries. The results are compared with experimental data and theoretical predictions from a three-body distorted-wave (3DW) model and a time-dependent close-coupling model. It is shown that the present MCB-NN results are in good agreement with the experiments in the scattering plane and the MCB results qualitatively reproduce the experimental structure outside the scattering plane. In particular, the MCB theory predicts the 'double-peak' structure in the perpendicular plane.

Effective fully differential cross-section in single ionization of helium by fast ions

“…The agreement was good for electron ejection in the scattering plane as expected, but it was very poor for the perpendicular plane. The experimental data of [11] recorded in the perpendicular plane were not reproduced by either of the applied conventional quantal calculations [18][19][20][21][22][23][24][25][26][27][28]. Better agreements were obtained by the classical trajectory Monte Carlo method [29,30], where the experimental bin sizes for the final state were taken into account.…”

Double differential cross sections for ionization of H by 75 keV proton impact: Assessing the role of correlated wave functions*

“…It is necessary to include the PT interaction at the level of multiple differential cross sections. [22,23] Therefore, the role of the correlation and PT interaction deserves to be studied and analyzed in more detail (see Refs. [8,9,13] and references therein).…”