Ludlum Measurements 334A, Operation Manual

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Model 334A Operations Manual
Ludlum Measurements, Inc 31 January 2021
Starting a Dose Measurement
Response Check Routine
Before starting a dose measurement, the Model 334A should be tested using the Response
Check routine to make sure that it is operating properly and in calibration. The purpose of
the Response Check is to verify the following:

A consistent activity is reported from a source of known activity

The detector and MCA are functioning properly

The source isotope is correctly identified, the peak area properly measured, and that the
alpha efficiency has not changed.
Source Requirements
In source checks, the source used should have an active (plated) diameter of at least 25mm
(1-inch). If the active area is larger, the activity of the 25mm area must be known so that
when masked to that size, the activity is accurate. The overall diameter of the source can be
no larger than 32mm (1.26-inch). The sources also need to match the isotope-of-interest the
Model 334A is configured to measure.
SECTION
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