Radioactive Cup Source: Strontium ‐ 90kBqThe active material is enclosed in metal foil fixed in a cylindrical mount provided with a stem of 4mm diameter
The foil is further protected from accidental damage by a wire gauze cap over the open 'window' of the mount
The nature and strength of each source is clearly engraved on its mount and it is also colour coded for identification
Each is supplied in a small lead 'castle' in a suitably labelled MDF storage box (100mm x 75mm x 65mm)
A data sheet is enclosed with each.5�Ci (185 kBq) of Strontium90 in equilibrium with its daughter nuclide Yttrium90, incorporated in a silver disc allowing the major proportion of the Beta radiation to escape
Emissions: �
Half‐life: 28 years (strontium), 64 hours (yttrium)
Colour code: YellowRequirements for purchase:Welsh state schools need a permit from the Welsh Assembly
Scottish schools require approval from the Scottish Government Education Directorate
Schools in Northern Ireland require a DENI permit
State schools in England do not require a Letter of Authorisation
Independent schools in England, Wales & Northern Ireland do not require a Letter of Authorisation
