Absolute neutron flux measurements using an NE-110 scintillation counter

Scintillation Detectors for Fast Neutrons

“…For energies of about 20 keV to 5 MeV, any kind of organic scintillator can be used. Renner et al [158] have demonstrated that pulse height spectra taken for mono-energetic neutrons in this range, using plastic scintillators of various thickness, are in excellent agreement with MC-simulations made using the O5S-code [159], both in shape and absolute scale. Provided low-mass encapsulation is used these detector systems can be regarded as metrological reference systems because the cross sections needed for the response calculations are among the best known reference data available and have an almost smooth energy dependence in this energy region except for a few resonances in the scattering cross section for carbon.…”

SCINFUL: A Monte Carlo based computer program to determine a scintillator full energy response to neutron detection for E/sub n/ between 0. 1 and 80 MeV: Program development and comparisons of program predictions with experimental data

“…The Renner et al 14 Table 2 are for a detector which is "black" to the E n < 1 MeV neutrons being detected, and so the efficiencies are all large. Most of the slight differences between calculation and experiment are probably due to the curved back surface of the detector which is not modelled in the program; the program used the thinnest distance in the calculation.…”

“…Renner, et al 14 published results for E" < 1 MeV for data taken with NE-110 detectors. Two detectors were used; one was 0.64 cm thick by 1.25 cm radius anc the neutron beam struck the entire front face, and the other was 5.1 cm in radius by 6.6-7.6 cm thick (the back surface was curved) and the incident neutron beam was collimated to a 1.6-cm-diam spot centered on the front face of the detector.…”

Majority-Logic NE-110 Detector for keV Neutrons

“…The pulse height scale used in this work is the system of light units defined by Verbinski et al 3 The K-series x-ray from a silver fluorescent x-ray source 4 (22 keV) had been calibrated on this pulse height scale in an earlier work 2 and was used as the pulse height calibration in the present study (Ag x-ray photopeak = 0.0143 light units = 200 keV proton recoil energy).…”

“…(2) is subject to the constraint that i+j+k=N and that at least 2 of the arguments are equal to or greater than 1. That is, terms of the form Pi(0)P 2 (0)P 3 (2) will not contribute. This last constraint explicitly takes into account the majority-oftwo coincidence requirement.…”