Sensitivity of prompt neutron multiplicity to fission fragment characteristics

The present work is focusing on the sensitivity of prompt neutron multiplicity to different properties of the fission fragments. In the construction of the fragmentation range of the Point-by-Point treatment the use of different Z prescriptions affects the multi-parametric matrices of different fragment and prompt emission quantities q(A,Z,TKE). The non-negligible influence of how the most probable charge is considered (as UCD without or with the charge deviations ΔZ as a function of A or an average ΔZ value) as well as the number of Z taken at each A, are discussed. The calculated average prompt emission quantities as a function of A, as a function of TKE and total average ones depend on the accuracy of experimental Y(A,TKE) distributions. The prompt neutron multiplicity of complementary fragments νpair(A) has a low sensitivity to the TXE partition between complementary fully-accelerated fragments. This assures a good prediction of the average prompt neutron multiplicity as a function of TKE and of the total average one even in the case of a rough or inappropriate TXE partition. The systematic behaviour revealed by the experimental ratio νH/νpair as a function of AH together with the low sensitivity of νpair(A) to the TXE partition can be exploited -in the absence of experimental ν(A) information- for an indirect verification of predicted ν(A).

TUDORA A.;  HAMBSCH Franz-Josef;  OBERSTEDT Stephan;  GIUBEGA G.;  VISAN I.; 

2015-12-21

AMER NUCLEAR SOC

JRC91628

0029-5639,   

http://www.ans.org/pubs/journals/nse/a_37651,    https://publications.jrc.ec.europa.eu/repository/handle/JRC91628,   

10.13182/NSE14-108,