In this paper the response in term of pulse height linearity of two Hamamatsu photomultipliers is investigated, when coupled to a LaBr3:Ce scintillation crystal. The two photodetectors have high quantum efficiency and in particular 30% for R6231-01 and 42% for R7600-200 tube. The substantial difference is in the dynode structure, linear focused and metal channel for R6231 and R7600 respectively. In this work in order to verify the non-linearity effects on the pulse height distribution, due principally to the high and fast light production of LaBr3:Ce scintillator, we propose a 'peak by peak' procedure to calibrate the pulse height distribution. Utilizing a specific fragmentation of the calibration curve in subsets, the calculated energy values are very similar for both PMTs. This result confirmed the potentiality of the procedure to highlight the non-linearity effects on pulse height distribution. © 2011 Elsevier B.V.
Pulse height non-linearity in LaBr3:Ce crystal for gamma ray spectrometry and imaging / Pani, Roberto; Cinti, Maria Nerina; Pellegrini, Rosanna; P., Bennati; S., Ridolfi; R., Scafe; V., Orsolini Cencelli; F., De Notaristefani; A., Fabbri; F. L., Navarria; N., Lanconelli; G., Moschini; P., Boccaccio. - In: NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS. - ISSN 0920-5632. - STAMPA. - 215:1(2011), pp. 168-172. [10.1016/j.nuclphysbps.2011.03.167]
Pulse height non-linearity in LaBr3:Ce crystal for gamma ray spectrometry and imaging
PANI, Roberto;CINTI, Maria Nerina;PELLEGRINI, Rosanna;
2011
Abstract
In this paper the response in term of pulse height linearity of two Hamamatsu photomultipliers is investigated, when coupled to a LaBr3:Ce scintillation crystal. The two photodetectors have high quantum efficiency and in particular 30% for R6231-01 and 42% for R7600-200 tube. The substantial difference is in the dynode structure, linear focused and metal channel for R6231 and R7600 respectively. In this work in order to verify the non-linearity effects on the pulse height distribution, due principally to the high and fast light production of LaBr3:Ce scintillator, we propose a 'peak by peak' procedure to calibrate the pulse height distribution. Utilizing a specific fragmentation of the calibration curve in subsets, the calculated energy values are very similar for both PMTs. This result confirmed the potentiality of the procedure to highlight the non-linearity effects on pulse height distribution. © 2011 Elsevier B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
