Credit: RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA/SCIENCE PHOTO LIBRARY

Caption: Alpha particle penetrating ability. At left is a disc of polonium 210 (red), a radioactive isotope of the element, and at right is a Geiger counter. Between the two is a thin piece of aluminium foil. Polonium 210 emits alpha particles, which are helium nuclei (two protons and two neutrons) emitted by unstable atomic nuclei. They are only able to travel a few centimetres through the air and very few are able to penetrate the aluminium foil. To see this apparatus without the aluminium shield see clip K004/4570.

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

Keywords: alpha decay, aluminium foil, apha particles, apparatus, decaying, demonstration, detecting, detection, emission, emitting, geiger counter, geiger-muller counter, isotope, measurement, measuring, no-one, nobody, penetrating ability, physical, physics, polonium 210, radioactive, radioactivity, radioisotope, radionuclide, school science, science education, shield

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Alpha particle penetrating ability

K004/4569 Rights Managed

Downloadable master

Duration: 00:00:18.2

Frame size: 1920x1080

Frame rate: 25

Audio: Yes

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 284.0M

Original

Capture format: Sony FS700

Codec: Apple ProRes 422 HQ

Interlaced: Yes

Please contact Science Photo Library if you require the original, or other formats.

 

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