Serial sources:57Co active part is prepared by electrodeposition of high-purity carrier-free 57Co onto a thin (thickness: 6 µm or less, diameter: 4-8 mm) metal matrix followed with controlled annealing process. Standard matrix is rhodium. Active part is placed into titanium alloy holder with brazed beryllium window and sealed with laser welding. In case of ordering a source for liquid Helium temperature application additional notification is required.
Point sources: The source is a beryllium capsule with active part inside, inserted into a titanium alloy holder. The holder is a single-piece element with truncated cone shaped front end and threaded tail piece. Source active part is a metal matrix with thermally diffused 57Co isotope. Source tightness is achieved by glued and welded joints. Point sources are not suitable for use at liquid Helium temperature.