Sealed sources are useful for occasionally checking Beta-RAM stability. Mounted in a modified Beta-RAM cell holder, they are easily inserted and removed from the instrument. When in use, they maintain the normal photomultiplier tube spacing. Both 3H and14C sources are offered, but the 3H source is considered the more rigorous test of performance. However, with tritium having a half-life of 12.36 years, decay correction should be practiced to obtain long-term comparisons.

  • ST3 - Sealed 3H Source
  • ST14 - Sealed 14C Source


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Scintillation Cells