Measurement of Dielectric Suppression of Bremsstrahlung

Details Measurement of Dielectric Suppression of Bremsstrahlung Measurement of Dielectric Suppression of Bremsstrahlung

1995-12-20

arxiv.org/abs/hep-ph/9512381v2

Phys.Rev.Lett.76:3550-3553,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, format is postscript file, gzip-ed, uuencode-ed

Scientific paper

10.1103/PhysRevLett.76.3550

In 1953, Ter-Mikaelian predicted that the bremsstrahlung of low energy photons in a medium is suppressed because of interactions between the produced photon and the electrons in the medium. This suppression occurs because the emission takes place over on a long distance scale, allowing for destructive interference between different instantaneous photon emission amplitudes. We present here measurements of bremsstrahlung cross sections of 200 keV to 20 MeV photons produced by 8 and 25 GeV electrons in carbon and gold targets. Our data shows that dielectric suppression occurs at the predicted level, reducing the cross section up to 75 percent in our data.

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