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Over the years, Ludlum Measurements has written several technical articles in support of our products. These articles cover topics such as troubleshooting and repair tips, calibration techniques, and other information related to radiation detection and instrumentation.
From time to time, we get phone calls from end users of LMI instruments who have questions about check sources that are optional accessories with our instruments. (The exception to the "optional" part is that a check source is standard equipment with gate monitor systems.)
Many of you are familiar with check sources, what they are and how they are used; however, for those of you who are not, here is a short explanation.
The following peaking procedure is used in-house at Ludlum Measurements, Inc. for peaking LMI Models 44-10, 44-11, 44-20, 203, and 243 detectors on the 662-keV 137Cs peak with a Model 2200 Scaler/Ratemeter. Other scintillation detectors are peaked in the same manner, but have different values for resolution.
In Part 1, we discussed the peaking procedure used in-house at LMI for peaking LMI Models 44-10, 44-11, 44-20, 203, and 243 detectors on the 662-keV 137Cs photopeak with a Model 2200 Scaler-Ratemeter. Other scintillation detectors are peaked in the same manner, but have different values for resolution. In Part 2, we will cover using the LMI Model 2200 in peaking for other isotopes. The specific detector model is not germane to this discussion, as resolution of the detector will not be addressed.
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