Positronium formation in a laser field including the dressing effect

Journal Article · Sat Jul 15 04:00:00 EDT 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.40.567· OSTI ID:5975465

Bhattacharya, M; Sinha, C; Sil, N C

A detailed analysis is given for the study of positronium (Ps) formation in /ital e//sup +/+H collisions in the presence of a homogeneous, single-mode laser field, considering full interaction. The projectile--laser-field interaction and the dressing effect on the target hydrogen atom and the Ps atom in the final channel are considered to first order. The field is treated classically in the dipole approximation to calculate the dressing effect. We consider the dressing effects of the hydrogen atom and the Ps atom for the field directions both parallel and perpendicular to the incident momentum (/ital scr//bold E//sub 0//parallel//bold k//sub /ital i// and /ital scr//bold E//sub 0//perpendicular//bold k//sub /ital i//). The dressing effects are shown to produce significant modifications of the differential cross section. The differential cross sections for Ps formation with and without the dressing are presented for no-photon and one-photon (/ital l/=0,/plus minus/1) exchange at 50, 75, 100, and 200 eV energies with laser-field amplitude /vert bar//ital scr//bold E//sub 0//vert bar/=0.02 a.u. and the angular frequency /omega/=0.074 a.u.

• Research Organization: Department of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700032, India (IN); Department of Physics, University of Milan, Milan, Italy; Department of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700032, India; Department of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700032, India
• OSTI ID: 5975465
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 40:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640303* -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BORN APPROXIMATION
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 10-100
HYDROGEN
LASER RADIATION
NONMETALS
PARTICLE PRODUCTION
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
POSITRONIUM
RADIATIONS