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physical phenomena > event > atomic process > collision > spin-flip collision
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spin-flip collision comparison table
Subject see also is a kind of has definition
collision atomic process 
spin-flip collision21-cm radiationcollisionCollision between particles in which the direction of the spin angular momentum changes. Since the total angular momentum is conserved, the orbital angular momentum must be changed in magnitude or direction or both.

Next collision: Coulomb collision    Up: collision    Previous collision: scattering