Anisotropy of the fission fragments from neutron-induced fission in the intermediate energy range of 1–200 MeV

Angular distributions and anisotropy of fission fragments from neutron-induced fission in intermediate energy range 1–200 MeV

“…The 235 U anisotropy data by Leal-Cidoncha [15] are located systematically above (∼2-3%) the data available in EXFOR. In neutron energy range above 50 MeV these data are higher than our data [1] (∼8% at 100 MeV).…”

“…There is a general agreement between these data and previous data in low neutron energy range 1-20 MeV. In neutron energy range above 50 MeV these data are lower than our data [1] (∼10% at 100 MeV). Also it is seen that the anisotropy is less than 1.0 at neutron energy about 100 MeV.…”

“…This work was performed with the use of quasi-monochromatic neutron source. Therefore, it seems appropriate to compare their results with data obtained recently at TOF spectrometers such as GNEIS (PNPI) [1,2], n TOF (CERN) [13][14][15] and WNR (LANSCE) [16]. This analysis gives the possibility to determine anisotropy of angular distribution of fission fragments and estimate systematical errors of used methods and experimental setups.…”

“…1. Detailed description of the setup and readout system created on the basis of waveform digitizers can be found in our previous publications [1,2]. It was located at the flight path 5 of the TOF-facility GNEIS [3] at a distance of 36 m from the pulsed neutron source.…”

Fission Fragment Angular Distribution measurements of235U and238U at CERN n_TOF facility

“…The FFAD experimental data for the (n,f) reactions of 235 U and 238 U published in the EX-FOR [2] database reach 20 MeV, the only 238 U data exceeding this energy up to 100 MeV are those of Ryzhov et al [3]. The recently published data of 238 U and 235 U by Vorobyev et al [4] and the data of Leong [5] …”