VEGA VEGASOURCE 35 Emitter loading and exchange - Manual (Page 25)

3 Supplement
3.1 T echnical data
Source
Take note of the specifications in the operating instructions of the source container
VEGASOURCE.
Attenuation factor and half value layers
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Source Co-60 Cs-137 Co-60 Cs-137
Attenuation factor 37 294 181 3100
Number of the half-value
layers 5.2 8.2 7.5 11.6
Tab. 1: Attenuation factor and half value layers
Max. activity of the source
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Co-60 max. 0.74 GBq (20 mCi) max. 3.7 GBq (100 mCi)
Cs-137 max. 22.2 GBq (600 mCi) max. 111.0 GBq (3000 mCi)
Tab. 2: Maximum activity of the source
Product-related fluctuations of the source activity and tolerances of the measuring instruments are
not taken into account for the above data.
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