Limitations on the validity of impulse approximation in Compton scattering

The validity of impulse approximation (IA), which is commonly used in the description of Compton scattering of photons from atomic electrons, is discussed with particular attention to the kinematical region in which the photon momentum transfer k is not much larger than the average bound electron mo...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2007-08, Vol.261 (1-2), p.175-179
Main Authors: Pratt, R.H., LaJohn, L.A., Suric, T., Chatterjee, B.K., Roy, S.C.
Format: Article
Language:English
Subjects:
Asymmetry
Compton profile
Compton scattering
Impulse approximation
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Summary:The validity of impulse approximation (IA), which is commonly used in the description of Compton scattering of photons from atomic electrons, is discussed with particular attention to the kinematical region in which the photon momentum transfer k is not much larger than the average bound electron momentum a of a given shell. IA can be justified in the Compton peak region of the spectrum if a/k≪1. However, for the doubly differential cross-section of photon–atom scattering (ejected electrons not observed) IA is commonly used, and viewed as adequate, while only requiring that a/k
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2007.03.085