Model 3030 & 3030E Series Technical Manual Section 7
Ludlum Measurements, Inc. Page 31 November 2017
7. % alpha to beta crosstalk
8. % beta to alpha crosstalk
9. After the plateau is complete, you can either save the plateau to an
ASCII text file or print the results for later reference.
10. You may choose the operating voltage according to your own
standards. Ludlum Measurements current standards, which may
or may not be appropriate for your use, are listed below:
(a)
99
Tc efficiency (4π) greater than or equal to 27%
(b)
239
Pu efficiency (4π) greater than or equal to 37%
(c) Alpha crosstalk in beta channel less than or equal to 10%
(d) Beta crosstalk in alpha channel less than or equal to 1%
(e) Beta background is less than or equal to 50 cpm
(f) Alpha background is less than or equal to 3 cpm
11. By double-clicking on a row after the plateau has completed, the
user may automatically update the efficiencies, background
subtract, and crosstalk values, or the user can manually enter in
the values to update the instrument.
Manual Entry:
12. Enter the selected operating voltage in the field marked “High
Voltage (Vdc)” and click “Update.” This action stores the
chosen operating voltage inside the Model 3030.
13. Click on “DPM” under the Count Mode area to select DPM mode.
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