Positronium-hydrogen elastic scattering: The electronic S = 1 state

Journal Article · Sun Aug 01 04:00:00 EDT 1976 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.14.894· OSTI ID:7181541

Drachman, R J; Houston, S K

We have continued our investigation into the elastic scattering of positronium atoms by hydrogen atoms, extending the work to include the spin-one (triplet) state of the two electrons. Once again we have extracted the S-wave phase shifts from normalizable trial functions by examining the spatial behavior of the center-of-mass wave functions. An effective-range expansion linear in the positronium energy fits the results very well and leads to a scattering length a/sup -/ /sup approximately/ /sup 2//sup .3//sup 6//suba/sub 0/, compared with the static result a/sup -/ /sup 2//sup .4//sup 76//suba/sub 0/ of Hara and Fraser. The S-wave total and ortho-para conversion cross sections are calculated by making use of both /sup 1/S and /sup 3/S results. In the /sup 3/S case, we see no indication of any resonances below the excitation threshold at 5.1 eV. (AIP)

• Research Organization: Theoretical Studies Group, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771
• OSTI ID: 7181541
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 14:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640303 -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
COLLISIONS
CRYOGENIC FLUIDS
ELASTIC SCATTERING
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY LEVELS
FLUIDS
HYDROGEN
NONMETALS
POSITRONIUM
S STATES
SCATTERING