COMPACT LOW-LEVEL COUNTING ARRANGEMENT

Technical Report · Sat Oct 31 00:00:00 EST 1959

OSTI ID:4287412

van Duuren, K; Hofker, W K; Hermsen, J

The contribution of mesons to the background of a beta counter is customarily eliminated by means of a ring of anticoincidence counters. The application of a counter tube with hollow anode, instead of a ring of Geiger counters, gives the possibility of anticoincidence arrangement of much simpler and more compact design. A beta counter is placed inside the hollow anode of the guard counter in such a way that all mesons that strike the beta counter have crossed the gas volume of the hollow anode counter. All coincident pulses are eliminated with an anticoincidence circuit. As only two counters are used, the complete electrical circuitry will be very simple. Due to the compact shape of this anticoincidence arrangement a considerable saving of weight for the shielding can be achieved. Background measurements were done for an end-window halogenquenched beta counter. By a proper choice of materials and dimensions of this counter a considerably lower background counting rate for the beta counter than for the equivalent Philips' counter tube 18505 could be obtained. In an anticoincidence arrangement with a shield of 20 cm iron and 2.5 cm mercury the residual background amounted to 0.7 to 0.9 counts/min. The counting properties of the guard counter and the beta counter were investigated. (auth)

• Research Organization: Philips' Research Labs., Amsterdam
• NSA Number: NSA-13-006761
• OSTI ID: 4287412
• Report Number(s): A/CONF.15/P/2343
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-59
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

INSTRUMENTS
ANODES
BACKGROUND
BETA DETECTION
BUILDING MATERIALS
CIRCUITS
COINCIDENCE METHODS
CONFIGURATION
COUNTERS
EFFICIENCY
ENERGY LEVELS
GASES
GEIGER-MUELLER COUNTERS
HALOGENS
IRON
MEASURED VALUES
MERCURY
MESONS
OPERATION
PERFORMANCE
PLANNING
PULSES
QUENCHING
RADIATION DETECTORS
SENSITIVITY
SHIELDING
TESTING
THICKNESS
USES
VOLUME
WEIGHT
WINDOWS