Small-Angle Differential Cross Sections for Symmetrical Resonant Charge Exchange in Molecular Hydrogen
Abstract
We measured state selective scattering angle distributions in non-dissociative-state single electron capture in { 5, 7.5, 10} keV/u, [H+ + H2] and [H2+ + H2] collisions, using Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS). In our measurements, range of the scattering angle was small where diffraction effect is expected to take place, and, the ground state electron capture - symmetrical resonant channel for the H2+ projectile and near resonant channel for the H+ projectile - was fully resolved from other channels. We analyzed the data considering H2+ and H2 possess two independent-identical scattering centers and exhibit multi center interference effect. By comparing these equal-velocity collisions, we investigated the atomic nature of the individual scattering centers. We observed Fraunhofer diffraction from a circular aperture like patterns with equal fringe widths, for both the projectiles, in ground state channel. We applied a simple toy model to reconstruct the circular apertures.
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BibTeX
@misc{mukherjee2026smallangle,
title = {{Small-Angle Differential Cross Sections for Symmetrical Resonant Charge Exchange in Molecular Hydrogen}},
author = {Jibak Mukherjee and Kamal Kumar and Harpreet Singh and Manojit Das and Deepankar Misra},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.20381},
eprint = {2609.20381},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.20381},
}
RIS
TY - UNPB
TI - Small-Angle Differential Cross Sections for Symmetrical Resonant Charge Exchange in Molecular Hydrogen
AU - Jibak Mukherjee
AU - Kamal Kumar
AU - Harpreet Singh
AU - Manojit Das
AU - Deepankar Misra
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2609.20381
UR - https://arxiv.org/abs/2609.20381
AB - We measured state selective scattering angle distributions in non-dissociative-state single electron capture in { 5, 7.5, 10} keV/u, [H^+ + H_2] and [H_2^+ + H_2] collisions, using Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS). In our measurements, range of the scattering angle was small where diffraction effect is expected to take place, and, the ground state electron capture - symmetrical resonant channel for the H_2^+ projectile and near resonant channel for the H^+ projectile - was fully resolved from other channels. We analyzed the data considering H_2^+ and H_2 possess two independent-identical scattering centers and exhibit multi center interference effect. By comparing these equal-velocity collisions, we investigated the atomic nature of the individual scattering centers. We observed Fraunhofer diffraction from a circular aperture like patterns with equal fringe widths, for both the projectiles, in ground state channel. We applied a simple toy model to reconstruct the circular apertures.
ER -