THE ABSOLUTE MEASUREMENT OF /cap beta/-RADIOACTIVITY BY 4$pi$ COUNTING USING PLASTIC SCINTILLATORS

Journal Article · Sat Dec 01 04:00:00 EST 1962 · Physics in Medicine and Biology (England)

DOI:https://doi.org/10.1088/0031-9155/7/3/304· OSTI ID:4748287

Radoszewski, T; Trott, N G

A description is given of a simple type 4 pi BETA -scintillation counter which consists of a single 13 stage photomultiplier tube and two thin (%PX1.3 mm thick, 2.5 cm square) plastic scintillators having sources mounted between them, operated at -25 deg C. The characteristics of the instrument are discussed and results of intercomparisons of measurements of solutions of several radio nuclides by this and a 4 pi Geiger BETA -counting technique are reported. It is concluded that the method is satisfactory for the absolute measurement of BETA -emitters of maximum energy approximates 0.5 Mev and above, Although the accuracy attained is unlikely to exceed tha t possible using 4 pi Geiger and proportional counting techniques. It is noted that the comparative simplicity of the method should prove an advantage were highest accuracy in such measurements is not required. (auth)

• Research Organization: Royal Cancer Hospital, London
• NSA Number: NSA-17-006459
• OSTI ID: 4748287
• Journal Information: Physics in Medicine and Biology (England), Journal Name: Physics in Medicine and Biology (England) Vol. Vol: 7; ISSN PHMBA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BETA DECAY
BETA DETECTION
ENERGY
GEIGER-MUELLER COUNTERS
INSTRUMENTS AND INSTRUMENTATION
MEASURED VALUES
PHOTOMULTIPLIERS
POLYMERS
PROPORTIONAL COUNTERS
RADIOISOTOPES
SCINTILLATION COUNTERS
SOLUTIONS
TEMPERATURE