U.S. Educator Pricing Only
A replacement PB-210 Needle Source. It is USNRC License Exempt (US only). Outside the US, consult local laws and regulations. Purchased sources are "Non-Cancellable" and "Non-Refundable". See the bottom of this page for details.
The Diffusion Cloud Chamber is used to view high energy alpha particles, lower energy beta particles, and electrons produced by gamma rays interacting with gas molecules. The Chamber allows for the viewing of cosmic rays without the need for dry ice or external illumination.
About the Pb-210 Needle Source:
A needle source is used to generate a point source of radiation inside cloud chambers for demonstrating alpha and beta radiation tracks.
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.
Diffusion Cloud Chamber (15 cm diameter)
Diffusion Cloud Chamber (15 cm diameter) - No Source
Pb-210 Source Needle
|12 VDC Power Adapter (6 A)|
|Water Circulation Pump|
|2 Rubber Hoses|
|Source Holder and Stopper|
|High Voltage Connection Cable|
|SpecTech™ Coupon for Pb-210 Source Needle|
The bottom of the chamber is cooled by circulating ice water through the base and further cooling it to -35 C with a Peltier device. Alcohol placed in the chamber wicks up the inside chamber lining where it evaporates in the warmer region of the chamber and diffuses downward. The alcohol vapor is then cooled near the chamber bottom and becomes super saturated.
As energetic alpha and beta particles from a radioactive source pass through the alcohol vapor, the vapor condenses, forming droplets that appear as tracks in the strong chamber cross-lighting.
|Product Name||Part Number||Price||Qty.||Select|
|Pb-210 Source Needle||SE-7945||
Before purchasing PASCO radioactive sources:
Local, national, and international regulations may restrict the purchase, storage, transport, use or disposal of radioactive sources. Please consult your local regulations to ensure your compliancebefore you purchase radioactive sources.