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

Caption: Geiger counter detecting alpha particles emitted by a disc of polonium 210 (red), a radioactive isotope of the element. Alpha particles 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 are unable to penetrate even thin materials.

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

Keywords: alpha decay, 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

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Detecting alpha particle radiation

K004/4570 Rights Managed

Downloadable master

Duration: 00:00:22

Frame size: 1920x1080

Frame rate: 25

Audio: Yes

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

File size: 332.1M

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Capture format: Sony FS700

Codec: Apple ProRes 422 HQ

Interlaced: Yes

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