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QUASIDIATOMIC APPROACH TO THE COLLISIONS OF LOW KEV MOLECULAR IONS WITH ATOMS (CHARGE-TRANSFER, ALIGNMENT)
Abstract
The polarization of L(,(alpha)) radiation is measured in coincidence with a charged particle scattered at specific laboratory angles, resulting from the collision induced dissociation of low keV H(,2)('+) and H(,3)('+) incident on target gases. Coincidence measurements of the polarization pattern are made for a variety of scattering angles for 3.22 keV H(,2)('+) incident on He and Ne, and for 4.83 keV H(,3)('+) incident on He. The molecular states excited during the collision are determined from the alignment of the observed polarization patterns. A quasidiatomic collision model, which is an extension of the electron promotion model of ion-atom collisions at low keV energies to molecule-atom collisional systems, is developed to interpret the experimental results. The rules of building simple quasidiatomic correlation diagrams, to qualitatively estimate the dynamical behavior of molecular collisions, are presented. The general idea of treating the molecule as an atom under certain circumstances, is applied to a molecular two-state calculation of the differential charge-transfer probabilities in H('+)-H(,2) collisions. This calculation reproduces the essential features of previous experiments.
Subject Area
Molecules
Recommended Citation
YENEN, ORHAN, "QUASIDIATOMIC APPROACH TO THE COLLISIONS OF LOW KEV MOLECULAR IONS WITH ATOMS (CHARGE-TRANSFER, ALIGNMENT)" (1986). ETD collection for University of Nebraska-Lincoln. AAI8704566.
https://digitalcommons.unl.edu/dissertations/AAI8704566