4$pi$-SCINTILLATION COUNTER FOR SMALL BETA ACTIVITY MEASUREMENTS

Journal Article · Mon Dec 31 23:00:00 EST 1962 · Nukleonika (Poland)

OSTI ID:4010865

Natkaniec, I; Niewiadomski, T

The beta detector utilizes two photomultiplier tubes, each of which has a plastic scintillator coupled to it with a light pipe. The scintillators are separated by% thin airgap for 4 pi geometry. The detectors are placed in a quickopening shield, and their outputs are added and sent to an amplifier, discriminator, and counter. The characteristics of the detector are given as a function of voltage across the photomultiplier bleeder string, the gain of the amplifier, and the thickness of the scintillator pair. The thin scintillators were found to be extremely insensitive to gamma radiation in measuring /sup 40/K activity, as determined by blocking out the beta activity with aluminum foils. The background of the detector arrangement is low and could be further improved by using thinner scintillators and an anticoincidence circuit. (TTT)

• Research Organization: Inst. of Nuclear Physics, Academy of Sciences, Kralow
• NSA Number: NSA-18-020380
• OSTI ID: 4010865
• Journal Information: Nukleonika (Poland), Journal Name: Nukleonika (Poland) Vol. Vol: 8; ISSN NUKLA
• Country of Publication: Country unknown/Code not available
• Language: Polish

Related Subjects

AIR
ALUMINUM
AMPLIFIERS
BACKGROUND
BETA DETECTION
BETA PARTICLES
COINCIDENCE METHODS
ELECTRIC POTENTIAL
FILTERS
GAMMA RADIATION
INSTRUMENTATION
MEASURED VALUES
PHOSPHORS
PHOTOMULTIPLIERS
POLYMERS
POTASSIUM 40
PULSE ANALYZERS
RADIOACTIVITY
SCINTILLATION COUNTERS
SENSITIVITY
THICKNESS