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Scintillation Detector for Measuring Unknown $beta$ Emitters Deposited on Large-Surface Filters; DETECTEUR A SCINTILLATION POUR LA DOSIMETRIE D'EMETTEURS BETA INCONNUS DEPOSES SUR FILTRE DE GRANDE SURFACE

Technical Report ·
OSTI ID:4078284
An apparatus is described for direct counting, using a plastic scintillator, of unknown emitters occurring in atmospheric samples collected on large-surface filters (10 cm diameter). The quality of the apparatus depends largely on the uniformity of the photocathode in the photomultiplier used. The counter which was built had a countirg efficiency for a 10 cm diameter source of 30% for S/sup 35/, 88% for P/sup 32/, 45% for unknown emitters and a background noise of 56 cpm. (auth)
Research Organization:
France. Commissariat a l'Energie Atomique. Centre d'Etudes Nucleaires, Saclay
NSA Number:
NSA-18-014203
OSTI ID:
4078284
Report Number(s):
CEA-2356
Country of Publication:
France
Language:
English