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Radioactive Needle Sources

NS-PB210 NS-SR90 NS-PO210
Quick and easy way to show emission with cloud chambers.

  • Safe to use
  • Easy disposal
Needle sources are used to generate a point source of radiation inside cloud chambers for demonstrating alpha and beta radiation tracks. Three different types of isotopes are offered, a pure alpha emitter, a pure beta emitter and a combined alpha/beta emitter.

The sources are constructed by depositing a small, license exempt quantity of radioactive isotope onto the eye of a standard sewing needle which is mounted on a test tube stopper for insertion into the cloud chamber. The needle and stopper are placed into a test tube for protection during shipping and storage.



Item # Description Activity Half-Life Emission Unit Availability Price Quantity
470220-476 Lead-210 Needle Source, 0.01 uCi
0.01 μCi 22.3 years Alpha (α) Beta (β) Each Retrieving Restricted
470220-472 Polonium-210 Needle Source, 0.01 uCi
0.01 μCi 138 days Alpha (α) Each Retrieving Restricted
470220-474 Strontium-90 Needle Source, 0.01 uCi
0.01 μCi 28.8 years Beta (β) Each Retrieving Restricted
restricted This product is marked as restricted and can only be purchased by approved Shipping Accounts. To apply for a shipping account number, click here. If you need further assistance, call Customer Service at 800-387-9393 or email


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