TY - JOUR
T1 - Elaborate treatment of the inelastic collisions of positrons with alkali atoms and alkaline-earth positive ions using a restricted coupled-static approximation
AU - Abdel-Raouf, Mohamed Assad
PY - 1990/3/1
Y1 - 1990/3/1
N2 - We present the results of a very elaborate investigation of the inelastic collisions of positrons with the ground states of the first four alkali atoms (3Li,11Na,19K and38Rb) and their electronically resemblant alkaline-earth positive ions, i.e. 4Be+,12Mg+,20Ca+ and39Sr+, respectively, using a restricted coupled-static approximation in which the reactance matrices are adjusted to be symmetrical. Our interest is concentrated on the calculation of the total elastic and positronium formation cross-sections and their behaviour in the low-energy region (below 10 eV for the atoms) or the regions above the positronium formation thresholds (when the ions are considered). Our results are the most accurate cross-sections expected from the approximation employed. They reveal, within their limits, the most important characteristics of these cross-sections and provide us with a satisfactory comparison between the main features of positron-atom and positron-ion collisions.
AB - We present the results of a very elaborate investigation of the inelastic collisions of positrons with the ground states of the first four alkali atoms (3Li,11Na,19K and38Rb) and their electronically resemblant alkaline-earth positive ions, i.e. 4Be+,12Mg+,20Ca+ and39Sr+, respectively, using a restricted coupled-static approximation in which the reactance matrices are adjusted to be symmetrical. Our interest is concentrated on the calculation of the total elastic and positronium formation cross-sections and their behaviour in the low-energy region (below 10 eV for the atoms) or the regions above the positronium formation thresholds (when the ions are considered). Our results are the most accurate cross-sections expected from the approximation employed. They reveal, within their limits, the most important characteristics of these cross-sections and provide us with a satisfactory comparison between the main features of positron-atom and positron-ion collisions.
KW - Charge transfer
KW - Inelastic scattering of atoms and molecules
UR - http://www.scopus.com/inward/record.url?scp=51249177465&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=51249177465&partnerID=8YFLogxK
U2 - 10.1007/BF02450901
DO - 10.1007/BF02450901
M3 - Article
AN - SCOPUS:51249177465
VL - 12
SP - 339
EP - 352
JO - Nuovo Cimento della Societa Italiana di Fisica D - Condensed Matter, Atomic, Molecular and Chemical Physics, Biophysics
JF - Nuovo Cimento della Societa Italiana di Fisica D - Condensed Matter, Atomic, Molecular and Chemical Physics, Biophysics
SN - 0392-6737
IS - 3
ER -