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Positron annihilation methods and applied researches for materials such as polymers

Hirade, Tetsuya  

A positron, an anti-particle of an electron, annihilates with an electron and emits energy that is proportional to mass energy as annihilation $$gamma$$-rays. Positron annihilation methods are applied by detecting these $$gamma$$-rays. The information of annihilation time, energy of $$gamma$$-rays, and direction of $$gamma$$-rays emission has been used for materials science. Here, positron annihilation lifetime, doppler broadening of annihilation $$gamma$$-rays and positron annihilation age-momentum correlation are mainly explained by use of research examples for metals and polymers, etc.

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