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Development of an absolute gas-counting capability for low to medium activities
R M Williams1, C E Aalseth, J H Ely
1Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, USA. Richard.Williams@pnnl.gov
Abstract:
Pacific Northwest National Laboratory (PNNL) is developing a capability to measure the absolute activity concentration of gaseous radionuclides using length-compensated proportional-counting. This capability will enable the validation of low-level calibration standards for use in PNNL's new shallow underground laboratory. Two sets of unequal length proportional counters have been fabricated; one set has been fabricated using ultra-low background (ULB) electroformed copper and a second set fabricated from Oxygen-Free High-Conductivity Copper (OFHC).
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