Developing detectors operating in time coincidence is a possible way to increase the sensitivity in gamma spectroscopy. Such design allows both the selection of specific events and the rejection of background. In this work we present a new low background detector mainly developed for the determination of radioactive contamination of liquid samples. The system was constructed by combining a liquid organic scintillator, for the detection of alpha and beta particles, and a High Purity Germanium for the detection of correlated gamma rays. Despite being located in a non-underground laboratory, the instrument can reach sensitivities in the range of tens mBq/kg for U-238, U-235 and Th-232, exploiting alpha-gamma and beta-gamma coincidence events.

Baccolo, G., Barresi, A., Beretta, M., Chiesa, D., Nastasi, M., Previtali, E., et al. (2021). Development of a low background alpha–beta/gamma coincidence detector. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 1003 [10.1016/j.nima.2021.165290].

Development of a low background alpha–beta/gamma coincidence detector

Baccolo, G.;
2021-01-01

Abstract

Developing detectors operating in time coincidence is a possible way to increase the sensitivity in gamma spectroscopy. Such design allows both the selection of specific events and the rejection of background. In this work we present a new low background detector mainly developed for the determination of radioactive contamination of liquid samples. The system was constructed by combining a liquid organic scintillator, for the detection of alpha and beta particles, and a High Purity Germanium for the detection of correlated gamma rays. Despite being located in a non-underground laboratory, the instrument can reach sensitivities in the range of tens mBq/kg for U-238, U-235 and Th-232, exploiting alpha-gamma and beta-gamma coincidence events.
2021
Baccolo, G., Barresi, A., Beretta, M., Chiesa, D., Nastasi, M., Previtali, E., et al. (2021). Development of a low background alpha–beta/gamma coincidence detector. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 1003 [10.1016/j.nima.2021.165290].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/468641
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact