Alpha particles in a cloud chamber

Alpha particles in a cloud chamber

A132/0028 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 24.5MB

Downloadable file size: 1.8MB

Price image Pricing

Please login to use the price calculator


Credit: SCIENCE PHOTO LIBRARY

Caption: In a series of classic cloud chamber experiments in the late 1920s, English physicist Patrick Blackett obtained clear evidence of how alpha particles scatter from atomic nuclei of different masses. In this pair of pictures, alpha particles stream upwards through the chamber. One in each picture scatters a nucleus in the helium gas filling the chamber. The two particles move off at a 90-degree angle in each case, revealing that they have the same mass - alpha particles are helium nuclei. (The angle is in fact slightly less than 90 degrees because the tracks have been photographed at an angle).

Release details: Model release not required. Property release not required.

Keywords: alpha particle, alpha ray, cloud chamber image, helium nucleus, particle physics, photo

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.