A FAST-NEUTRON MONITOR ALLOWING SEPARATION OF THE $gamma$-BACKGROUND

Journal Article · Tue Jan 01 04:00:00 EST 1963 · Acad. Rep. Populare Romine, Studii Cercetari Fiz.

OSTI ID:4031626

Diaconescu, A

The organic scintillators used for the detection of fast neutrons are efficient but also very sensitive toward gamma radiation and therefore the gamma flux, which accompanies the neutron flux of the reactor, must be eliminated before detection. Following a scheme proposed by F. D. Brooks which the various radiations are separated on the basis of the decay time of the generated light pulse, an instrument was built for discriminating against the background radiation. The pulse from the dynode was integrated by a circuit with a time constant of 10 mu sec which was much higher than the decay time of the light flux. The device was successfully used to distinguish the desired radiation. A potentiometer was used to adjust the system in such a way that only the neutron-generated pulses appeared on the screen. By using a stilbene crystal, neutrons from a Po-- Be guished against the radiation from a /sup 60/Co source. (TTT)

• Research Organization: Inst. of Atomic Physics, Bucharest
• NSA Number: NSA-18-018181
• OSTI ID: 4031626
• Journal Information: Acad. Rep. Populare Romine, Studii Cercetari Fiz., Journal Name: Acad. Rep. Populare Romine, Studii Cercetari Fiz. Vol. Vol: 14
• Country of Publication: Country unknown/Code not available
• Language: Rumanian

Related Subjects

BACKGROUND
BERYLLIUM
CIRCUITS
COBALT 60
DISCRIMINATORS
ELECTRIC POTENTIAL
ELECTRODES
FAST NEUTRONS
GAMMA RADIATION
INSTRUMENTATION
INSTRUMENTS
NEUTRON DETECTION
NEUTRON FLUX
NEUTRON SOURCES
ORGANIC COMPOUNDS
PHOSPHORS
PHOTOMULTIPLIERS
POLONIUM
POTENTIOMETRY
PULSE ANALYZERS
PULSES
QUALITATIVE ANALYSIS
RADIATIONS
RESOLUTION
SCINTILLATIONS
SENSITIVITY
STILBENE