Measurement of the response function and the detection efficiency of an organic liquid scintillator for neutrons between 1 and 30 MeV

Abstract

The light output function of a φ50.8 mm × 50.8 mm BC501A scintillation detector was measured in the neutron energy region of 1 to 30 MeV by fitting the pulse height (PH) spectra for neutrons with the simulations from the NRESP code at the edge range. Using the new light output function, the neutron detection efficiency was determined with two Monte–Carlo codes, NEFF and SCINFUL. The calculated efficiency was corrected by comparing the simulated PH spectra with the measured ones. The determined efficiency was verified at the near threshold region and normalized with a Proton-Recoil-Telescope (PRT) at the 8–14 MeV energy region.

Calibration and Unfolding of the Pulse Height Spectra of Liquid Scintillator-Based Neutron Detectors Using Photon Sources

“…The position of the half-height of the broadened Compton edge is often assumed to correspond to the true Compton edge, but in fact the two edges could differ by several percentage points [16] . Therefore, an accurate iteration method was employed to determine the Compton edge for different photon sources by fitting the calculated spectra to the measured ones [17,18] . Table 1.…”

Energy calibration of a BC501A liquid scintillator using a γ-γ coincidence technique

“…The first method, viz. the Monte Carlo method, is described by the ICARUS Collaboration [2] and Huang Hanxiong [3]. The Monte Carlo Compton electron spectrum N MC (E) is generated by means of a threedimensional photon transport code GRESP [4] without considering the resolution smearing of the detector.…”