Double ionization of helium in fast ion collisions: the role of momentum transfer

Autor:	J. P. Grandin, B. Bapat, Rido Mann, R. Moshammer, H. Kollmus, Joachim Ullrich, W. Schmitt, Lamri Adoui, Th. Weber, Kh. Khayyat, Reinhard Dörner, S Keller, Amine Cassimi
Rok vydání:	1999
Předmět:	Physics Total angular momentum quantum number Ionization Double ionization Angular momentum coupling Angular momentum of light Momentum transfer Orbital angular momentum of light Electron Atomic physics Condensed Matter Physics Atomic and Molecular Physics and Optics
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 32:1859-1872
ISSN:	1361-6455 0953-4075
DOI:	10.1088/0953-4075/32/8/307
Popis:	Double ionization of helium in the perturbative regime has been explored in a kinematically complete collision experiment using 100 MeV/u C 6+ ions. Different ionization mechanisms are identified by inspecting the angular distribution of the electrons as a function of the momentum transfer q to the target by the projectile. For q 1 :2 au, the faster electron resulting from a binary encounter with the projectile is emitted along the direction of momentum transfer, while the other electron is distributed uniformly. Experimental data are compared with various model calculations based on the Bethe-Born approximation with shake-off. Surprisingly, the effect of the final state interaction is found to depend decisively on the choice of the initial state wavefunction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5c6a5d749346995363f92204ebef8de5 https://doi.org/10.1088/0953-4075/32/8/307 Zobrazit plný text záznamu