Autor(es): Rodrigues, T. E. ; Martins, M. N. ; Arruda-Neto, J. D T ; Mesa, J. ; Garcia, C. ; Shtejer, K. ; Garcia, F.
Data: 2014
Identificador Persistente: http://hdl.handle.net/11449/70160
Origem: Oasisbr
Assunto(s): Atoms; Helium; Compound nucleuses; Cross sections; Energy ranges; Extended versions; Intermediate energies; Intranuclear cascade models; Monte carlo; Multiple particles; New approaches; Photoabsorption; Zirconium
Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:22:43Z No. of bitstreams: 0
Made available in DSpace on 2014-05-27T11:22:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-12-01
A new approach based on a N-a cluster photoabsorption model is proposed for the understanding of the puzzling steady increase behavior of the 90Zr (e, α) yield measured at the National Bureau of Standards (NBS) within the Giant Dipole Resonance and quasideuteron energy range. The calculation takes into account the pre-equilibrium emissions of protons, neutrons and alpha particles in the framework of an extended version of the multicollisional intranuclear cascade model (MCMC). Another Monte Carlo based algorithm describes the statistical decay of the compound nucleus in terms of the competition between particle evaporation (p, n, d, α, 3He and t) and nuclear fission. The results reproduce quite successfully the 90Zr (e,α) yield, suggesting that emissions of a particles are essential for the interpretation of the exotic increase of the cross sections.
Physics Institute University of Sao Paulo, P.O.Box 66318, Sao Paulo
Bioscience Institute Sao Paulo State University, Botucatu
Center of Applied Studies for Nuclear Developments (CEADEN), Havana
Santa Cruz State University, Ilheus
Bioscience Institute Sao Paulo State University, Botucatu
