Speaker
Description
The influence of fragment distributions (experimental or theoretical) on the prompt emission results deserves a special investigation, as a part of methods and procedures used for the validation of fission fragment distributions. Such investigations are based on the primary model results (which consist of matrices of different prompt emission quantities as a function of fragment A, Z and its kinetic energy) already validated by their good description of existing experimental data. These validated matrices are then averaged over the studied fission fragment distributions. This paper includes the investigation of the influence of 4 fragment distributions Y(A,TKE) (three experimental and one theoretical) of 235U(nth,f) and 3 distributions (2 experimental and one theoretical) of 252Cf(SF) on prompt emission model results (as single distributions, e.g. prompt neutron multiplicity ν(A), ν(TKE) and centre-of-mass energy <ε>(A), <ε>(TKE) etc. and total average values, e.g. <ν>, <ε>, prompt neutron spectra, prompt γ-ray energy etc.).
The anti-correlation between the single fragment distribution TKE(A) and the distribution of total excitation energy of fully accelerated fragments TXE(A) reflected in the distribution of prompt neutron multiplicity of fragment pair νpair(A) is envisaged. The important role played on the distributions of different prompt emission quantities as a function of A by both the fission fragment distribution and the energy partition in fission is highlighted. Other correlations related to Y(TKE) and prompt emission quantities as a function of TKE as well as the role played by Y(A,TKE) on different total average prompt mission quantities are discussed, too.