Response of a BaF2 scintillation detector to quasi-monoenergetic fast neutrons in the range of 45 to 198MeV

Scintillation Detectors for Fast Neutrons

“…Thirdly, inorganic crystal materials are typically higher-Z and denser than organic scintillator materials and therefore present more nuclei per unit volume to the incident neutron beam as well as a higher stopping power for the charged nuclear reaction products released in the neutron detection process. The combined effects of these three factors are, firstly, to make inorganic scintillators like BaF 2 more efficient neutron detectors than organic scintillators at high energy, when compared at the same physical size [95], and secondly to reduce the effects of charged particle escape (wall effect) from the scintillator. With these considerations in mind it seems likely that other inorganic scintillators such as detectors 6-8 in Table 3 may also become popular for high-energy neutron detection in future.…”

“…CsI(Tl)-scintillators are often used as E-detector in recoil proton telescopes. Very recently [95,166], the response of a 17 cm thick BaF 2 -crystal was calibrated for neutron energies up to 200 MeV. While the responses calculated with the FLUKA-code considerably underestimated the experimental data, the experimental efficiencies were interpolated for the normalisation of tof-spectra.…”

Double Differential Neutron Yields From Thick Targets Induced by Relativistic Carbon and Uranium Beams

“…This experimental area has an area of roughly 7×20 m 2 and a height of 4.8 m. A time-of-flight method with a veto detector for charged particles was used to measure the double differential neutron yields. The flight distance was varied between 3 and 7 m. A ∆E-E-telescope [3,4] with a hexagonally (inner diam. : 8.75 cm) shaped stop-detector was used to detect the neutrons.…”

“…Table 2 describes all the detectors used for the measurements. Details can be found in [4]. In addition the large area neutron detector LAND [5] was used to measure the neutron yields at forward angles from the uranium beam [6].…”

Neutron response of the LAMBDA spectrometer and neutron interaction length in BaF2

“…The efficiency for neutron energies up to 22 MeV was measured by Matulewicz et al [10], while Kubota et al [11] measured the efficiency between 15 MeV and 45 MeV by introducing a PSD cut on the neutron events. The response to fast neutrons in the energy ranges MeV was studied by R. A. Kryager et al [12] and Gunzert-Marx et al [13], respectively. The investigation was extended to relativistic neutrons with energies up to 1300 MeV by V. Wagner et al [14].…”