Neutron-induced fission fragment angular distributions, anisotropy, and linear momentum transfer measured with the NIFFTE fission time projection chamber

Recoil Proton Telescopes and Parallel Plate Avalanche Counters for the 235U(n,f) cross section measurement relative to H(n,n)H between 10 and 450 MeV neutron energy

“…In the simulation the detected angle was reconstructed as in the experiment, taking into account the angular and energy stragglings. In the simulation the angular distribution is always isotropic, and we checked at 100 MeV and 1 GeV that the computed average linear momentum transfer is in accordance with the NIFFTE results [49] and with [50], and allows us to test the boost effects.…”

Measurement of the $^{236}$U fission cross section and angular distributions of fragments from fission of $^{235}$U and $^{236}$U in neutron energy range of 0.3-500 MeV

“…They are shown in Fig. 14(b) together with the results of other authors used catcher foil technique [17], proportional gas counters [16,34], semiconductors [35,36] and "track" detectors [37], as well as a gridded ionization fission chamber [38] and a time-projection chamber (TPC) [39,40].…”

“…[40] lies below the total mass of experimental points available in the international library of experimental nuclear data EXFOR [41]. According to the authors of [40], this is due to the fact that all previously published data use a normalization at low incident neutron energies in order to determine the detection efficiency of their fission fragment detectors. However, no comparative analysis of the details of various experiments was given.…”

“…Figure 14. The anisotropy of the angular distributions of the 235 U fission fragments: (a) -comparison of the results of measurements performed by us earlier with new data; (b)comparison of our data obtained as a result of averaging of our old and new data with experimental data of other authors[16,17,[34][35][36][37][38][39][40]. A solid curve passing through the points is given only for visualization of experimental data.…”

The fast neutron induced fission of $^{240}$Pu and $^{242}$Pu

“…The energy loss of the fission products in the target deposit and the carbon foil were calculated using the Northcliffe-Schilling tables and assuming that the fission event took place in the middle of target [29]. The linear momentum transfer (LMT) was parameterized using data from the 239 Pu(n,f) reaction and fit from E n = 7-120 MeV [30,31]. For E n < 7 MeV, LMT was assumed to be 100 %.…”