Second-order Born cross sections for positronium formation in positron-hydrogen collisions

Journal Article · Sun Feb 28 23:00:00 EST 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.47.2386· OSTI ID:6653101

Igarashi, A ^[1]; Toshima, N ^[2]

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1. Institute of Applied Physics, University of Tsukuba, Ibaraki 305 (Japan)
2. Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305 (Japan) Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01 (Japan)

The second-order Born cross sections of positronium formation are calculated for positron-hydrogen collisions in the energy region below 100 eV and compared with the recent measurement of Sperber [ital et] [ital al]. [Phys. Rev. Lett. 68, 3690 (1992)]. Better agreement is achieved above 25 eV than other existing theoretical values including elaborate close-coupling calculations. This result implies that continuum states that are not taken into account fully in other theoretical calculations are contributing significantly to positronium formation through a second-order process.

• OSTI ID: 6653101
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 47:3; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300 -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
664500* -- Special Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BORN APPROXIMATION
COLLISIONS
CROSS SECTIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 10-100
FUNCTIONS
GREEN FUNCTION
HYDROGEN
NONMETALS
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
POSITRONIUM
SYNTHESIS