54733-10BA2L
2 – 156 02.2017
1 System Description Volume 2
1.2.2 Sources
Sources are not part of the SENSseries LB 480 measuring system.
They can be purchased separately through BERTHOLD
TECHNOLOGIES together with the respective shieldings and
holding devices.
Radioactive sources for industrial applications are always "encapsu-
lated radioactive substances" which are tightly welded into a sturdy
capsule made of titan or stainless steel, so that the radioactive sub-
stance cannot leak out. Contamination is therefore ruled out. More-
over, any activation of the product being measured by the sources
used is not possible for physical reasons.
The following radiation sources are used for measurement:
• Co-60 emits Gamma radiation with an energy of 1.17 or
1.33MeV. It is available as rod or point-shaped source. The
influence of interferences due to gas density fluctuations and
varying wall deposits is lower than with Cs-137. The half-life
period of Co-60 is 5.27 years.
• Cs-137 emits Gamma radiation with an energy of 0.66MeV.
Typically, it is delivered as a point-shaped source, occasionally
as a rod-shaped source. The half-life period of Cs-137 is about
30 years.
To Next Page
Loading...
