Abstract
The deterministic modelling of sequential prompt emission in fission based on recursive equations of residual temperature was applied to numerous fission cases. This fact emphasized systematics and correlations between different quantities characterizing the residual fragments and the sequential emission. General forms of residual temperature distributions for each emission sequence are determined on the basis of these systematics, having as application the inclusion of sequential emission into the Los Alamos model. Also the systematics can serve to obtain indicative values of different average quantities in the absence of any prompt emission model.
Highlights
The deterministic modelling of sequential prompt emission in fission based on recursive equations of residual temperature was applied to numerous fission cases
The sequential emission modelling was applied to a large number of fission cases for which reliable experimental data of Y(A,TKE) distributions exist
The same method of total excitation energy (TXE) partition based on modelling at scission which is used in the PbP treatment (Ref.[2] and references therein) is employed in this model, too
Summary
A deterministic modelling of sequential prompt emission in fission was recently developed (see Ref.[1] for details) This treatment is based on recursive transcendent equations of the nuclear temperature of residual fragments. By solving such equations for each emission sequence “k” corresponding to each initial (pre-neutron) fragment {A, Z} at each TKE value of the fragmentation and TKE ranges, multi-parametric matrices of different quantities –generically labelled qk(A,Z,TKE)- characterizing the initial and residual fragments and the prompt emission are obtained (e.g. nuclear temperature Tk(A,Z,TKE) and excitation energy Ek(A,Z,TKE), average prompt neutron energy in the centre-of-mass frame k(A,Z,TKE) etc.) These quantities appear with the probability expressed by the fragment distribution Y(A,Z,TKE). Different prescriptions concerning the compound nucleus cross-section of the inverse process of neutron evaporation σc(ε) and the level density parameter of initial and residual fragments were used
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