Suppression of soft nuclear bremsstrahlung in proton-nucleus collisions

Details Suppression of soft nuclear bremsstrahlung in proton-nucleus collisions Suppression of soft nuclear bremsstrahlung in proton-nucleus collisions

2001-11-30

arxiv.org/abs/nucl-ex/0111021v1

Phys.Rev.Lett.88:122302,2002

Physics

Nuclear Physics

Nuclear Experiment

12 pages, 3 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.88.122302

Photon energy spectra up to the kinematic limit have been measured in 190 MeV proton reactions with light and heavy nuclei to investigate the influence of the multiple-scattering process on the photon production. Relative to the predictions of models based on a quasi-free production mechanism a strong suppression of bremsstrahlung is observed in the low-energy region of the photon spectrum. We attribute this effect to the interference of photon amplitudes due to multiple scattering of nucleons in the nuclear medium.

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