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Cs/Ba-137 Isotope Generator Products for Science Education

Ideal for radioactive decay experiments.

Manufacturer:  Spectrum Techniques IncSupplier Diversity Partner ISO

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Catalog No. S83190

This product is regulated by the federal government, and may not be ordered online.

Includes: Generator, syringe, tube, 250mL of solution, and a convenient storage case.



This CS-137/Ba-137m Isotope Generator was designed for school experiments to demonstrate the properties of radioactive decay. Each generator contains 10uCi of Cs-137.

Parent CS-137 isotope

  • Half-life of 30.1 years
  • Beta decays to the metastable state of Ba-137m
  • Further decays by gamma emission with a half-life of 2.6 minutes to the stable Ba-137 element
  • Ba-137m is milked from the generator, leaving behind the parent Cs-137
Ba-137 solution
  • Used to perform exponential decay experiments
  • After a 30-minute class, the short half-life of the solution reduces the residual activity, to less than 1/1000th of its initial activity
  • Safe for disposal by pouring down the drain

Order Info

This generator consists of only one exempt quantity, making it free from specific state and NRC licensing.



Isotope generator kit
Generator, syringe, tube, 250mL of solution and a convenient storage case
Radioactive decay experiment
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