The Diffusion Trapping Model is based on this process occurring at a certain rate, thus fulfilling the Smoluchowski boundary condition.
The Diffusion Trapping Model is based on this process occurring at a certain rate, thus fulfilling the Smoluchowski boundary condition. The PALS technique (*) uses it to measure the free volume of semicrystalline and amorphous solids. When it occurs, massless photons may be produced in even quantities in order to conserve 4-momentum. Most often observed between electrons and positrons in colliding-beam machines, FTP, name this process, the opposite of pair production, in which a particle and its antiparticle meet, converting all their mass to energy.
The Diffusion Trapping Model is based on this process occurring at a certain rate, thus fulfilling the Smoluchowski boundary condition.
(positron) {annihilation}