  Purpose: In this paper we investigated emission of bremsstrahlung photons in
the scattering of protons off deuterons within the microscopic cluster models
in a wide region of the beam energy from low energies up to 1.5 GeV. Methods:
Three-cluster model of bremsstrahlung is constructed for such a reaction.
Formalism of the model includes form factor of deuteron which characterizes
dependence of bremsstrahlung cross sections on structure of deuteron. This
gives possibility to investigate the structure of nuclei from analysis of
bremsstrahlung cross sections. Results: We studied dependence of the
bremsstrahlung cross section on the structure of deuteron. We use three
different shapes of the deuteron wave functions. Besides, we also calculate the
cross section by neglecting internal structure of deuteron. Analysis of
dependence of the cross section on such a parameter shows the following. (1) At
beam energies 145 and 195 MeV used in experiments bremsstrahlung cross section
is not sensitive visibly on variations of the shape of the deuteron wave
functions. (2) Stable difference between cross sections calculated with and
without internal structure of deuteron is observed at higher energy of beam
(larger 500 MeV). (3) The spectrum is increased as we pass from structureless
deuteron (the oscillator length $b=0$) to the deuteron discribed by the
shell-model wave function (the realistic oscillator length) inside the full
energy region of the emitted photons. Conclusion: Our cluster model is a
suitable tool to study the structure of deuteron with high enough precision
from bremsstrahlung analysis. We propose new experiments for such an
investigation.
