Annihilation in positron-atom collisions: A new approach

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.20.442· OSTI ID:6248320

Drachman, R J; Sucher, J

The method of Hiller, Sucher, and Feinberg for the evaluation of matrix elements of delta-function operators between bound-state wave functions has been extended to scattering states in another paper. The resulting identities can be used to improve the calculation of positron annihilation cross sections whenever an approximate positron-atom scattering wave function is known. In this paper the advantages of the method are illustrated first with the static model for e/sup +/-H scattering and then with the more realistic polarized-orbital approximation.

• Research Organization: Laboratory for Astronomy and Solar Physics, Goddard Space Flight Center, Greenbelt, Maryland 20771
• OSTI ID: 6248320
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 20:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANNIHILATION
ATOM COLLISIONS
BASIC INTERACTIONS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DELTA FUNCTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTS
FLUIDS
FUNCTIONS
HYDROGEN
INTERACTIONS
MATHEMATICAL OPERATORS
NONMETALS
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
QUANTUM OPERATORS