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