Annihilation (simple)

Annihilation (simple)

conservation of momentum:

before: system at rest; momentum ~ 0

after: two photons created; must have same energy and travel in opposite direction.

conservation of energy

before: 2 electrons, each with a rest mass of 511keV

after: 2 photons, each with 511keV.

g

g

b-

b+

decay via positron

emission

electron/positron

annihilation

annihilation

photon

annihilation

photon

Previous slide Next slide Back to the first slide View Graphic Version


NMD HomeCPET HomeWEB Comments - brian@petnet.buffalo.edu