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