Mictrorons are accelerators of electrons and are simultaneous sources of bremsstrahlung
 photon flux and fission neutrons. In 1982, a microtron of seventeen trajectories
 Microtron MT - 17 was put into operation at the National Institute of Physics of Vietnam.
 Though very modest, microtons are very useful for developing countries such as Vietnam
 in both fundamental and applied physics research. During the recent years by using the
 above mentioned MT - 17 and microtrons from other institutes we have carried out different
 investigations. In this report we present some results obtained in the studies of photonuclear
 reactions and photon activation analysis in the giant dipole resonance region.