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SUMMARY:Producing a standard thoron source.
DTSTART;VALUE=DATE-TIME:20190318T100000Z
DTEND;VALUE=DATE-TIME:20190318T103000Z
DTSTAMP;VALUE=DATE-TIME:20260308T212054Z
UID:indico-contribution-1322@indico.tlabs.ac.za
DESCRIPTION:Speakers: Robbie Lindsay (UWC)\nThoron (Rn-220) is the radon i
 sotope with a shorter half-life (55 s) than the better known Rn-222.  Thor
 on has been identified as a possible health concern in specific places suc
 h as monazite processing plants and (rare-earth) mines. The short half-lif
 e of thoron (55.8 s) makes thoron calibration sources and thoron chambers 
 less common than the corresponding radon ones. We have developed a  an ine
 xpensive and straight forward but accurate standard thoron source that can
  be  set up easily in typical nuclear environmental laboratories.   The so
 urce of thoron is a solution of Th(NO3)4 in water.  Thoron is extracted by
  bubbling air through the solution using an aerator.  The gamma rays from 
 the solution are measured at the same time.  The thoron activity concentra
 tion in the exit stream follows from the reduction in the intensity of the
  gamma rays from the progeny of thoron over time.\n\nhttps://indico.tlabs.
 ac.za/event/82/contributions/1322/
LOCATION:J Block Auditorium
URL:https://indico.tlabs.ac.za/event/82/contributions/1322/
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