SEMINÁRIO DO DEPARTAMENTO DE FÍSICA NUCLEAR
Título: Nuclear Fission and Spallation at Intermediate and High Energies.
Palestrante: Profa. Gayane Karapetyan - UFABC
Data: Quarta-feira, dia 23/11/16
Horário:14:00
Local: Sala de seminários do DFN (Linac)
Abstract: A large variety of experimental works has been done since the discovery of nuclear fission, aimed to study different aspects of the phenomenon. Yet our comprehension of the fission process is not complete. This is, among several reasons, due to a certain lack
in multi-parameter experimental data. One example is the correlation between yields of fission products and the angular momentum transferred in the initial stage of the interaction. Fragment charge and mass-yield measurements, determination the main kinematic characteristics of the fission fragment, give the complete set of observables and are therefore of interest from the point of view of modeling and understanding of the fission process. One of the most effective method to experimentally study the formation of nucleus residues is its registration by induced-activity method, which is based on the gamma-ray spectroscopy. Measurement of the induced-activity of irradiated targets, i.e. measurement of the main characteristics of the observed gamma-transitions, allows to identify of target residues in a wide mass range. In addition, by the induced-activity measurements it is possible to obtain the information of the production of high-spin isomers, determine the angular momentum of the fission products and its recoil properties. The study of pre-actinide and actinide nuclei performed in different experiments will be presented. Results on the decomposition of mass-yield distribution of the fission products in terms of the multimodal fission approach will be demonstrated and the perspectives discussed.
