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|  | Short-lived Radium
We maintain a delayed coincidence counting system that is used for the quantifying
the short lived radium isotopes (223Ra and 224Ra). Samples
are adsorbed onto a manganese fiber and then counted using the delayed coincidence
system. Samples are then ashed and counted in one of our coaxial gamma detectors
for long lived radium isotopes (226Ra and 228Ra)
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| Radon-222
We have the capability of collecting and analyzing for Radon a number of
ways. The standard radon extraction method; using helium and liquid nitrogen to
isolate the radon in a cold trap. Then transferring it to a Lucas cell and
counting it using a photomultiplier tube detector (PMT). We currently have
2 extraction ports and approximately 6 PMT's. The dual radon counting system,
model AC/DC-DRC-MK-10-2, shown below was made for us by Robert Lupton of Applied
Techniques Co.
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| Radon-222
More recently we have been using the Durridge RAD 7 electronic radon detector
to measure radon in water and air. This instrument has made our analysis
of radon much quicker, and more accurate. We have also been using this system
to make real time in situ radon measurements.
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