Angular distributions for double-electron capture inC4+-He collisions

Autor:	S. B. Elston, Henrik Cederquist, R. D. Miller, Ivan A. Sellin, L. R. Andersson, M. Westerlind, N. Keller, C. Biedermann
Rok vydání:	1993
Předmět:	Physics Matrix (mathematics) Range (particle radiation) Angular distribution chemistry Electron capture Diabatic chemistry.chemical_element Atomic physics Interference (wave propagation) Collision Atomic and Molecular Physics and Optics Helium
Zdroj:	Physical Review A. 48:3684-3688
ISSN:	1094-1622 1050-2947
Popis:	We have studied the angular distributions of double-electron capture in C 4+ +He collisions in the 400-800-eV collision energy range. At all measured energies an interference pattern has been observed which is attributed to Stueckelberg oscillations. A comparison with calculated differential cross sections using a two-state diabatic potential matrix of Danared and Barany [J. Phys. B 19, 3109 (1986)] shows a reasonable agreement at 800 eV, while at lower energies the calculations show a shift of the peak positions towards larger angles. An alternative model by Barat et al. [J. Phys. B 23, 2811 (1990)], developed for collisions in the keV range, was also employed and was found to agree less well with our data, succinctly illustrating the increasing sensitivity to the «exact» potential shape with decreasing collision energy
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e1b2f250e7e9aa51c028616e1556a989 https://doi.org/10.1103/physreva.48.3684 Zobrazit plný text záznamu