Conversion Electron Sources

The products shown on these pages are representative sources used for common applications.

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Application

These sources are intended for calibrating the energy response of magnetic or solid state electron detectors. The calibrated Bi-207 source can also be used to estimate the detection efficiency. Radionuclides have been chosen that have intense, easily resolvable, electrons from internal conversion.

Construction

A thin deposit of active material is glued between Mylar foils (drawing VZ-486-001), 0.9mg/cm2 thick, or between titanium foils (drawing VZ-392-001) each 2.4mg/cmthick. The foils are supported in an aluminium frame 25mm in diameter, 3mm thick. The diameter of the active deposit is approximately 5mm.

Ordering Information

Radionuclide Nominal activity [kBq] Window material Calibrated Product code
Bi-207 37 Titanium Uncalibrated BIRB1082
Bi-207 37 Mylar Uncalibrated BIRB1083
Bi-207 37 Mylar Calibrated1) BIRB4391
Cs-137 37 Mylar Uncalibrated CDRB4630
Cs-137 370 Mylar Uncalibrated CDRB4944
Cs-137 370 Titanium Uncalibrated CDRB5552
Cd-109 370 Mylar Uncalibrated CURB2955

1) Calibrated for activity