Diffusion Cloud Chamber, Replacement Pb-210 Source Needle

Needle source is used to generate a point source of radiation inside cloud chambers for demonstrating alpha and beta radiation tracks. A replacement part for Diffusion Cloud Chambers . The source is constructed by depositing a small 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. The source is USNRC License Exempt (US only).  Outside the US, consult local laws and regulations.