Systematics on fission fragment mass distribution of neutron induced ²³⁵ U fission

Abstract

Ting-Jin( ) 1) SUN Zheng-Jun( ) SHU Neng-Chuan( )

Research on the prompt neutron multiplicity of fission fragments for 235 U( n, f )

“…With the above two energy partitioning ways and the systematic parameters of fission fragment mass distribution of n+ 235 U fission system [8], in which the weight of symmetric and asymmetric fission as incident energy function is given, the energy partitioning ways at 3.0 MeV and 5.0 MeV are deduced, and shown in Fig. 3.…”

“…E tot γ = (6.6±0.03)+(0.0777±0.004)E n (MeV), (8) where E n is the incident neutron energy. Therefore, a linear relation with…”

Prompt neutron multiplicity distribution for 235 U(n,f) at incident energies up to 20 MeV

“…Using this idea and the systematic parameters of the FF mass distribution of the n+ 235 U fission system [8], in which the portion of symmetric and asymmetric fission as a function of incident energy was given, the energy partition at E n can be deduced. In Ref.…”

“…In Ref. [8], the yields Y s (symmetric fission) and Y as1 + Y as2 (asymmetric fission) can be calculated for every energy point (< 20 MeV), here, Y s +2(Y as1 +Y as2 ) = 2. With the above two energy partitions (R 0 and R L ) and the symmetric and asymmetric fission probabilities (Y s and Y as1 +Y as2 ), the energy partition R En for a given energy E n (< 20 MeV) can be calculated as…”