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Spectrum of Thin Target Bremsstrahlung Bounded by a Forward Circular Cone

 

作者: J. H. Hubbell,  

 

期刊: Journal of Applied Physics  (AIP Available online 1959)
卷期: Volume 30, issue 7  

页码: 981-984

 

ISSN:0021-8979

 

年代: 1959

 

DOI:10.1063/1.1777002

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The Schiff expression for the cross section per nucleus, for thin‐target bremsstrahlung into the angular and energy rangesd&thgr;0anddk, is integrated analytically over angle from zero to&thgr;¯0. Results are shown for the caseZ=78,E0−mc2=40 Mev andx¯=0.5, 1, 2, 4, and 8, whereE0−mc2is the kinetic energy of the incoming electron andx¯is the reduced angle&thgr;¯0E0/mc2. The fraction of the total cross section included in a cone of angle&thgr;¯0can be approximated to within 20% byx¯2/(1+x¯2). Atx¯=1, or&thgr;¯0=0.723°, the ratio of energy delivered by photons above (E0−mc2)/2 to that below is 9% greater than for the limiting spectral shape at&thgr;¯0=0, or that given by the Schiff expression at&thgr;0=0, and 13% greater than for the spectrum integrated over all angles. For a target of finite thickness, multiple electron scattering should partially suppress the spectral dependence onx¯.

 

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