State-selective electron capture in N⁵⁺-H and O⁶⁺-H collisions

Abstract

The two-centre atomic orbital close-coupling method is employed to study the electron capture reactions in collisions of N 5+ and O 6+ ions with ground state atomic hydrogen in the energy range from 0.5 to 200 keV u −1 . The interaction of an active electron with the projectile ion is represented by a model potential. Total and state-selective electron capture cross sections for the dominant and subdominant reaction channels are calculated and compared with the available experimental and theoretical data.

Electron capture in slow collisions of O6+ions with atomic hydrogen

“…They are compared with the theoretical SMOCC results of Harel & Jouin (1988), the AOCC results of Liu et al (2012) and Wu et al (2012), the QMOCC results of Wu et al (2012) and with the experimental data of Dijkkamp et al (1985). In the overlapping energy range, the present QMOCC results for capture to the n = 4 shell are in good agreement with the experiment, as well as with the SMOCC (Harel & Jouin 1988) and AOCC (Liu et al 2012;Wu et al 2012) results. As in the case of total electron capture, the present QMOCC results in the region below ∼0.2 keV u −1 considerably disagree with those of Wu et al (2012).…”

“…A noticeable difference between the results of two calculations appears only for energies above 0.1 keV u −1 . The present total cross sections are compared also with the results of previous theoretical calculations (Hanssen et al 1984;Bendahman et al 1985;Harel & Jouin 1988;Liu et al 2012;Wu et al 2012;Shipsey et al 1981) and with experimental data of Crandall et al (1979), Phaneuf et al (1982), Dijkkamp et al (1985), Panov et al (1983). We note that only the QMOCC result of Wu et al (2012) covers the energy range of the present work and extends up to 10 keV u −1 .…”

“…7 and 8, respectively. They are compared with the previous QMOCC (Wu et al 2012), SMOCC (Harel & Jouin 1988), and AOCC (Liu et al 2012;Wu et al 2012) results and with the emission spectroscopy measurements of Dijkkamp et al (1985). In Fig.…”

“…The absolute single electron-capture cross sections to 4l have been measured using the emission spectroscopy in the energy range between 0.94 and 7.5 keV u −1 by Dijkkamp et al (1985). On the theoretical side, electron capture cross-section calculations for this collision system have been performed by the semiclassical molecular orbital close-coupling (SCMOCC; Hanssen et al 1984;Bendahman et al 1985;Harel & Jouin 1988), atomic orbital close-coupling (AOCC; Liu et al 2012;Wu et al 2012), classical trajectory Monte Carlo (CTMC; Wu et al 2012;Olson & Salop 1977;Shipsey et al 1981), perturbed stationary states (PSS; Shipsey et al 1981) methods, and by the full quantum-mechanical molecular-orbital close-coupling (QMOCC) method (Wu et al 2012). The conclusion of these theoretical studies was that the electron capture process in these systems dominantly populates the n = 4 shell, and sub-dominantly populates the n = 5 shell.…”

Charge transfer in collisions of Beq+(q=2-4) and Bq+(q=3-5) ions with H

“…The electron capture processes of multiply charged impurity ions in magnetic fusion plasma with the neutral hydrogen species are also important in the studies of impurity transport in the edge and divertor plasma regions [2]. In the past three years, as one of the participants in the IAEA Coordinated Research Program on data for light ions, we have studied the collision processes between some basic edge/divertor plasma constituents (H + , H, He, H 2 ) and the light element atomic and molecular plasma impurities including Li, Be, B, C, N, O ions [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] by using the quantal molecular orbital close-coupling (QMOCC) and the two-center atomic orbital close-coupling (TC-AOCC) methods over a large energy region.…”