EXAMINATION OF THE CRITICAL RADIUS OF THE BF$sub 3$ COUNTER

Journal Article · Fri Jan 01 04:00:00 EST 1960 · Magyar Tudomanyos Akad. Atommag Kutato Intezete (Debrecen). Kozlemenyek

OSTI ID:4030785

Csikai, G; Molnar, E; Schlenk, B

A. Milojevic et al., (Proceedings of the Second International Conference on the Peaceful Uses of Atomic Energy. Geneva, 195S. 14. 325 P/493) have noticed that the sensi-tive volume of a BF/sub 3/ counter depends on a critical radius which is independent of the actual geometric dimensions of the apparatus. These findings could not be confirmed in experiments performed with a counter which was provided with a mica end window and was filled with BF/sub 3/ gas under a pressure of 150 and 300 mm of Hg. A beam of alpha -particles was introduced into the counter parallel with the anode. The radial variation of the number of pulses and the integral amplitude distribution obtained as a function of the electronic amplification were determined, using various anodic distances. It is postulated that the effect observed by Milojevic and his co-workers was due to the electronegative contamination of the BF/sub 3/ gas. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-015810
• OSTI ID: 4030785
• Journal Information: Magyar Tudomanyos Akad. Atommag Kutato Intezete (Debrecen). Kozlemenyek, Journal Name: Magyar Tudomanyos Akad. Atommag Kutato Intezete (Debrecen). Kozlemenyek Vol. Vol: 2
• Country of Publication: Country unknown/Code not available
• Language: Hungarian

Related Subjects

ALPHA PARTICLES
AMPLIFIERS
ANODES
BORON FLUORIDES
COUNTERS
CRITICALITY
ENGINEERING AND EQUIPMENT
MICA
PRESSURE
PULSES
VOLUME
WINDOWS