Annihilation

Forfatter/Opretter:

Jens Maus (http://jens-maus.de/)

Kredit:

own work - part of PhD thesis

• http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-23509

Shortlink:

https://dkwiki.dk/b/13672

kilde:

Wikimedia Commons

størrelse:

2266 x 1116 Pixel (190307 Bytes)

beskrivelse:

Image of the "annihilation" process known in elementary physics. It shows how a positron (e+) is emitted from the atomic nucleus together with a neutrino (v). The positron moves then randomly through the surrounding matter where it hits several different electrons (e-) until it finally loses enough energy that it interacts with a single electron. This process is called an "annihilation" and results in two diametrically emitted photons with a typical energy of 511 keV each. However, please note that under normal circumstances the photons are not emitted exactly diametrically (180 degrees). This is due to the remaining energy of the positron and therefore of the conservation of momentum.

Licens:

Public domain

Kommentar på licensen:

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Dette værk er blevet udgivet som offentlig ejendom af dets skaber, I, Jens Maus. Dette gælder i hele verden. I nogle lande er dette ikke juridisk muligt. I så fald: I, Jens Maus giver enhver ret til at anvende dette værk til ethvert formål, uden nogen restriktioner, medmindre sådanne restriktioner er påkrævede ved lov.