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Title: Compton scattering from positronium and validity of the impulse approximation

The cross sections for Compton scattering from positronium are calculated in the range from 1 to 100 keV incident photon energy. The calculations are based on the A{sup 2} term of the photon-electron or photon-positron interaction. Unlike in hydrogen, the scattering occurs from two centers and the interference effect plays an important role for energies below 8 keV. Because of the interference, the criterion for validity of the impulse approximation for positronium is more restrictive compared to that for hydrogen.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Department of Physics, University of Rijeka, Rijeka (Croatia)
  2. (Croatia) and University of Dubrovnik, Dubrovnik (Croatia)
  3. (United States)
Publication Date:
OSTI Identifier:
21546789
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 83; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.83.053406; (c) 2011 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPTON EFFECT; CROSS SECTIONS; HYDROGEN; IMPULSE APPROXIMATION; INTERFERENCE; KEV RANGE; PHOTON-ELECTRON INTERACTIONS; PHOTON-POSITRON COLLISIONS; POSITRONIUM APPROXIMATIONS; BASIC INTERACTIONS; CALCULATION METHODS; COLLISIONS; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; ELEMENTS; ENERGY RANGE; INTERACTIONS; NONMETALS; PARTICLE INTERACTIONS; PHOTON COLLISIONS; PHOTON-LEPTON INTERACTIONS; POSITRON COLLISIONS; SCATTERING