Portable Positron Measurement System (PPMS)

[JohnDPritchard]

2:37 "ppms uses radioisotopes, or a linear accelerator, to induce positrons in a material during production" ... "ppms provides data on the critical properties of the material such as lattice structure changes, dislocation density or size and density, and strain."

[JohnDPritchard]

1:44 "positrons, which are positively charged electrons, interact with the electronic structure of a material and provide a direct measure of that electronic structure"

[JohnDPritchard]

photon induced positron annihilation