DETECTION OF DISINTEGRATION FRAGMENTS AND CHARGED PARTICLES BY THIN SCINTILLATION FILMS
Journal Article
·
· Pribory i Tekh. Ekspt.
OSTI ID:4333815
The design of a disintegration fragment detector based on an application of thin scintillation films is presented. Terpheryl antharcene and 2.5 diphenyloxazol in various concentrations in polystyrene were used. The solution wss transferred by means of a pipette on to a glass surface and wss dried at room temperature for a number of hours. After the drying process, the film was easily detachable from the glass. To accelerate the drying process, the glass cna be warmed to 50 to 60 deg C. A layer of U/sup 235/ (1 mg/cm/sup 2/) placed in a beam of thermal neutrons was used as the source of disintegration fragments. The layer was placed in a vacuum chamber at a distance of 5 cm from the scintillation film. All the measurements were carried out using a photomultiplier collecting 100% of the photoelectrons. Pulses tom the photomultipler were fed into an amplifier, integral discriminator, and then to a counting device. Detectors based on thin scintillation films have a resolving time of the order of 3 x 10/ sup -9/d and can be used in fast coincidence schemes. It was found possible to detect disintegration fragments on a high alpha background. The efficiency of the detector for disintegration fragments and alpha particles is 100%. Their sensitivity to gamma rays and fast neutrons is low. Thin scintillation films with a deposited layer of Li/sup 6/ and U/sup 235/ can be used as fast detectors of thermal neutrons. (TCO)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-12-010837
- OSTI ID:
- 4333815
- Journal Information:
- Pribory i Tekh. Ekspt., Journal Name: Pribory i Tekh. Ekspt. Vol. Vol: No. 4
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ALPHA PARTICLES
AMPLIFIERS
ANTHRACENE
BACKGROUND
BEAMS
CHARGED PARTICLES
COINCIDENCE METHODS
COUNTERS
DETECTION
EFFICIENCY
ELECTRONS
ENERGY RANGE
ENRICHMENT
FAST NEUTRONS
FILMS
FISSION CHAMBERS
GAMMA RADIATION
GLASS
LAYERS
LITHIUM 6
ORGANIC NITROGEN COMPOUNDS
PHENYL RADICALS
PHOTOELECTRIC EFFECT
PHOTOMULTIPLIERS
PHYSICS
POLYSTYRENE
PREPARATION
PULSE ANALYZERS
PULSES
RESOLUTION
SCINTILLATION COUNTERS
SENSITIVITY
SOLUTIONS
SURFACES
TEMPERATURE
THERMAL NEUTRONS
URANIUM 235
VACUUM
AMPLIFIERS
ANTHRACENE
BACKGROUND
BEAMS
CHARGED PARTICLES
COINCIDENCE METHODS
COUNTERS
DETECTION
EFFICIENCY
ELECTRONS
ENERGY RANGE
ENRICHMENT
FAST NEUTRONS
FILMS
FISSION CHAMBERS
GAMMA RADIATION
GLASS
LAYERS
LITHIUM 6
ORGANIC NITROGEN COMPOUNDS
PHENYL RADICALS
PHOTOELECTRIC EFFECT
PHOTOMULTIPLIERS
PHYSICS
POLYSTYRENE
PREPARATION
PULSE ANALYZERS
PULSES
RESOLUTION
SCINTILLATION COUNTERS
SENSITIVITY
SOLUTIONS
SURFACES
TEMPERATURE
THERMAL NEUTRONS
URANIUM 235
VACUUM