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 Veterans Today - Your Radiation Week 
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Sun Nov 22, 2015 9:43 am
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I found this posted on the West Lake Landfill Facebook page. The guy said he got this information in an email from the EPA when he questioned them about what each channel was detecting.

Range 2: Ba-140
Range 3: I-131
Range 4: Kr-85
Range 5: Cs-137, Ba-137m & Cs-134
Range 6: Ru-106
Range 7: Y-91
Range 8: K-40
Range 9: Na-24, Mn-56
Range 10: Sr-90

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http://netc.com/chart/view.php?n=1%3AEB5A139C


Sun Nov 22, 2015 12:53 pm
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Thanks for the information, netc


Sun Nov 22, 2015 2:03 pm
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I believe it's ranges 3 and 5 that are the ones to watch the most. But translating a gamma range graph (which is a coarse spectrum) into an isotope is not so straight-forward. Some isotopes listed in the West Lake posting have several energy ranges, with only the primary range shown here. For example, if range 3 and 5 both show a spike, it does not necessarily mean both I-131 and Cs-137 are present, as each of these can show a spike in both ranges. See http://nukeprofessional.blogspot.ca/2013/11/cpm-of-gamma-in-energy-range-600-800kev.html, where the EPA energy ranges are described along with some isotopes that emit in these ranges.

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Tue Nov 24, 2015 9:30 pm
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