The Positronium state in quartz

Details The Positronium state in quartz The Positronium state in quartz

2009-04-13

arxiv.org/abs/0904.1954v1

Phys. Status Solidi C 6, 2523 (2009)

Physics

Condensed Matter

Materials Science

3 pages, 1 figure, to appear in Physica Status Solidi (c), presented at the 15th International Conference of Positron Annihila

Scientific paper

10.1002/pssc.200982130

The positronium state in quartz is described by a linear superposition of two states: the first describing the free positron in the crystal and the second corresponding to a positronium Bloch wavefunction in the lattice. The condition for positronium formation in the electron gas is deduced by using variational calculations of the positron binding energy to the electron system. The self annihilation parameter $\kappa$ introduced in positron lifetime experiments can be properly justified by using the mixed state. A variational method to calculate $\kappa$ is proposed.

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