Speaker
Description
The study of photonuclear reactions is an important fundamental task for obtaining information about the structure of the nucleus and the nature of the nuclear forces. At present, only reactions involving the escape of one or two neutrons in the giant dipole resonance region are well studied. We have studied the flux-weighted average cross sections of (γ,xn) reactions on natural iridium at bremsstrahlung with an end-point energy of 55 MeV.
The determination of the flux-weighted average cross sections of the studied photonuclear reactions was carried out by activation analysis methods. The source of the 55 MeV bremsstrahlung was a racetrack microtron of the Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics. In the experiment, an assembly of an iridium target and a tantalum monitor target was irradiated for one hour. The irradiated targets were then measured using Ortec® and Canberra® semiconductor spectrometers with ultrapure germanium detectors having an energy resolution of 1.8-2.0 keV for 1333 keV 60Co gamma radiation. The detection efficiency of the spectrometers was determined using standard calibration sources 152Eu, 226Ra, 137Cs.
The table summarises the experimental values of the flux-weighted average cross sections of the photonuclear reactions studied on natural iridium. The experimental values obtained were compared with theoretical values calculated in the framework of the constant temperature Fermi gas model and the Gogny-Hartree-Fock-Bogoluybov temperature-dependent density model using the Talys 1.96 program code.
| Section | Experimental and theoretical studies of nuclear reactions |
|---|
