Electron exchange model potential: Application to positronium helium scattering


Autoria(s): Biswas, P. K.; Adhikari, S. K.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/01/1999

Resumo

The formulation of a suitable nonlocal model potential for electron exchange is presented, checked with electron-hydrogen and electron-helium scattering, and applied to the study of elastic and inelastic scattering and ionization of orthopositronium (Ps) by helium. The elastic scattering and the n=2 excitations of Ps are investigated using a three-Ps-state close-coupling approximation. The higher (n greater than or equal to 3) excitations and ionization of Ps atoms are treated in the framework of the Born approximation with present exchange. Calculations are reported of phase shifts and elastic, Ps excitation, and total cross sections. The present target elastic total cross section agrees well with experimental results at thermal to medium energies. [S1050-2947(99)04201-8].

Formato

363-370

Identificador

http://dx.doi.org/10.1103/PhysRevA.59.363

Physical Review A. College Pk: American Physical Soc, v. 59, n. 1, p. 363-370, 1999.

1050-2947

http://hdl.handle.net/11449/23818

10.1103/PhysRevA.59.363

WOS:000078111500054

WOS000078111500054.pdf

Idioma(s)

eng

Publicador

American Physical Soc

Relação

Physical Review A

Direitos

closedAccess

Tipo

info:eu-repo/semantics/article