Characteristics of Gd-loaded liquid scintillators BC521 and BC525

Characteristic features of neutron detection properties of the loaded liquid scintillators, i.e., capture time distribution, pulse shape discrimination, and time resolution have been studied for two Gd-loaded liquid scintillators, BC521 and BC525. A new technique to measure the capture time distribution with a small size neutron detector (capacity 7.3 l) in combination with BaF2 γ-ray detectors has been demonstrated. The measured capture time distributions were in good agreement with the results obtained by Monte Carlo simulation using the computer code DENIS.