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Suppression of soft nuclear bremsstrahlung in proton-nucleus collisions |
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| Authors: | van Goethem M J Aphecetche L Bacelar J C S Delagrange H Díaz J d'Enterria D Hoefman M Holzmann R Huisman H Kalantar-Nayestanaki N Kugler A Löhner H Martínez G Messchendorp J G Ostendorf R W Schadmand S Siemssen R H Simon R S Schutz Y Turrisi R Volkerts M Wagner V Wilschut H W |
| Affiliation: | Kernfysisch Versneller Instituut, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands. |
| Abstract: | 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 quasifree 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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