The influence of pseudo states on the single-electron capture processes in low-energy collisions of N5+ with He. (12th March 2019)

• Record Type: Journal Article
• Authors: Wang, K; Qu, Y Z; Liu, C H; Liu, L; Wu, Y; Liebermann, H-P; Buenker, R J
• Is Part Of: Journal of physics. Volume 52:Number 7(2019:Apr. 01)
• Publication Date: 2019-03-12
• Subjects: atoms and ions collision -- quantum-mechanical molecular-orbital close-coupling -- potential curves -- pseudo state -- MRD-CI method; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/aafeb3
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: The nonradiative single-electron capture (SEC) processes for N 5+ (1 s 2 ) colliding with He atoms are investigated by using the quantum-mechanical molecular-orbital close-coupling method. Total and state-selective SEC cross sections are obtained in the energy range of 3–1700 eV amu −1, for which the ab initio potential curves and nonadiabatic coupling matrix elements (involving physical and pseudo states) are computed by using the multireference single- and double-excitation configuration-interaction method. It is found that the pseudo states are also important to obtain the convergent results, especially in the low-energy region. Moreover, our results indicate that the n = 3 states are the dominant states in the considered energy region, and that the electron translation factor effects become important when the energy is above 1 keV amu −1 . In addition, it is observed that the total and state-selective cross sections for SEC are in general agreement with all available experimental data.