THE ROLE OF IMPURITIES AND THE RADIUS EFFECT IN THE BF$sub 3$ PROPORTIONAL COUNTERS

Technical Report · Sat Oct 31 04:00:00 EST 1959

OSTI ID:4283428

Milojevic, A; Kurepa, M; Ribnikar, S

The influence of impurities on the characteristics of proportional BF/ sub 3/ counters was studied. Especially the contamination with SiF/sub 4/ was investigated, and the results obtained were compared with the characteristics of the counters filled with BF/sub 3/ gas, highly purified by thermodiffusion processing. In the study of the properlies of proportional Bf/sub 3/ counters, pulse amplitudes and counting rates as functions of the spatial distribution of the primary ionization were examined. The results were compared with corresponding Ar and Ar + C/sub 2/H/sub 5/OH proportional counters. Some hypotheses and conclusions about the discharge process are proposed, taking into consideration the radius effect'' and electron capture. The measurements were performed using end window B F/sub 3/ proportional counters and a carefully collimated Po alpha source. (auth)

• Research Organization: Inst. of Nuclear Sciences "Boris Kidric," Belgrade
• NSA Number: NSA-13-006715
• OSTI ID: 4283428
• Report Number(s): A/CONF.15/P/493
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA BEAMS
ALPHA PARTICLES
ARGON
BORON FLUORIDES
CAPTURE
CLEANING
CONFIGURATION
CONTAMINATION
DISTRIBUTION
EFFICIENCY
ELECTRIC DISCHARGES
ELECTRONS
ETHANOL
GASES
IMPURITIES
INSTRUMENTS
IONIZATION
MEASURED VALUES
MIXING
OPERATION
PARTICLE SOURCES
POLONIUM
PROPORTIONAL COUNTERS
PULSES
QUANTITATIVE ANALYSIS
SILICON FLUORIDES
THERMAL DIFFUSION
VOLUME
WINDOWS