Quasifree electron bremsstrahlung induced by 20-MeV-proton impact
- 1 October 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 24 (4) , 1720-1725
- https://doi.org/10.1103/physreva.24.1720
Abstract
Energy spectra and angular distributions of quasifree electron bremsstrahlung (QFEB) induced by 20-MeV-proton bombardments of a Be target have been measured with a Si (Li) detector. The Doppler shift of QFEB is clearly observed in the energy spectra and depends on the observation angle. The production cross section calculated from a free-electron approximation is compared with the experimental result and the agreement is quite satisfactory. The spectral shape near the high-energy end point of the QFEB definitely reflects the velocity distribution of the orbital electrons of the target atom. Angular distributions of secondary-electron bremsstrahlung were also measured and are compared with a calculation which includes relativistic retardation effects.Keywords
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