Credit: EQUINOX GRAPHICS/SCIENCE PHOTO LIBRARY

Caption: Animation of the triple alpha process, a stellar nuclear reaction that burns helium to create carbon and oxygen in the core of a star. The triple alpha process occurs late in a star's life, when most of its core hydrogen has been converted to helium. The helium-helium fusion reaction is unlikely, and its product, beryllium-8, decays almost immediately back to two helium nuclei. However, as the star's core starts to collapse due to lack of hydrogen fuel to support it, beryllium-8 is produced faster than it can decay. Helium-helium fusion releases energy as a gamma ray (yellow wave), and the immediate fusion of a further helium nucleus releases another gamma ray, and forms the more stable carbon-12. This can also fuse with another helium-4, forming the similarly stable oxygen-16. This process forms the vast majority of the carbon and oxygen in the universe.

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Triple alpha process nuclear reaction

K003/4576 Rights Managed

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Duration: 00:00:44.24

Frame size: 1920x1080

Frame rate: 25

Audio: No

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

File size: 1.3G

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Capture format: QuickTime Animation

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