par Moszynski, Marek;Costa, G.;Guillaume, G.;Heusch, Bernard;Huck, Alexander;Ring, Ch;Bizard, G.;Durand, Dominique;Péter, Jean;Tamain, Bernard;El Masri, Youssef;Hanappe, Francis 
Référence Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 317, 1-2, page (262-272)
Publication Publié, 1992-06
Référence Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 317, 1-2, page (262-272)
Publication Publié, 1992-06
Article révisé par les pairs
| Résumé : | The study of the n-γ discrimination for a large 4 I volume BC501A liquid scintillator coupled to a 130 mm diameter XP4512B photomultiplier was carried out by digital charge comparison method. A very good n-γ discrimination down to 100 keV of recoil electron energy was achieved. The measured relative intensity of the charge integrated at the slow component of the scintillation pulse and the photoelectron yield of the tested counter allow the factor of merit of the n-γ discrimination spectra to be calculated and to be compared with those measured experimentally. This shows that the main limitation of the n-γ discrimination is associated with the statistical fluctuation of the photoelectron number at the slow component. A serious effect of the distortion in the cable used to send the photomultiplier pulse to the electronics for the n-γ discrimination was studied. This suggests that the length of RG58 cable should be limited to about 40 m to preserve a high quality n-γ discrimination. © 1992. |
