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Development of krypton-85 sources for the Bureau of Mines coal dust combustion analyzer. Operations Division final report. [Gaseous /sup 85/Kr encapsulated in Ta; x-ray source]

Technical Report ·
DOI:https://doi.org/10.2172/7350091· OSTI ID:7350091
Americium-241 used as a radiation source in a field instrument for measuring coal concentrations in mine dust presents a contamination hazard if the instrument is damaged. Alternative source designs based on /sup 85/Kr were developed and evaluated. Krypton-85 beta particles were used to excite x-rays from a target and the x-rays were used in place of the /sup 241/Am gamma radiation. Output of sources using /sup 85/Kr foils was not high enough because the concentration of /sup 85/Kr in the foils was too low. Output of sources using gaseous /sup 85/Kr, encapsulated in tantalum was adequate for the coal dust analyzer although the associated radiation field from /sup 85/Kr gamma rays make these sources inappropriate for application in a portable instrument.
Research Organization:
Oak Ridge National Lab., Tenn. (USA)
DOE Contract Number:
W-7405-ENG-26
OSTI ID:
7350091
Report Number(s):
ORNL-5215
Country of Publication:
United States
Language:
English

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