The 90° differential cross section of the 12C(3He, γ1+2)15O reaction has been measured at 3He particle energies from 5.3 to 16.7 MeV in steps varying from 100 to 300 keV. The γ-rays were detected by a 23 cm long × 23 cm diameter NaI(Tl) crystal spectrometer enclosed in an anticoincidence shield. The yield curve shows a resonant behaviour at the energies Ex = 17.56 ± 0.06, 19.02 ± 0.12, and 23.80 ± 0.10 MeV.
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.