On the role of umklapp processes in the scattering of delocalized positronium by acoustic phonons in ionic crystals
- 1 February 1999
- journal article
- Published by Pleiades Publishing Ltd in JETP Letters
- Vol. 69 (3) , 231-235
- https://doi.org/10.1134/1.568019
Abstract
The effect of umklapp processes in the scattering of delocalized positronium atoms by acoustic phonons in ionic crystals is analyzed. It is shown that at temperatures above which this effect becomes large, umklapp scattering renormalizes the constant of the deformation potential of positronium. This renormalization has recently been observed in experiments measuring the momentum distribution of delocalized positronium in a MgF2 crystal.Keywords
This publication has 7 references indexed in Scilit:
- Quantum Processes in SemiconductorsPublished by Oxford University Press (OUP) ,2013
- Existence of free and self-trapped positronium states in alkali halide crystals: Theoretical analysis and comparison with experimentPhysical Review B, 1998
- Positronium in alkali halides: Tunneling from the delocalized to the self-trapped statePhysical Review B, 1998
- Analysis of Momentum Distribution of Bloch-Positronium in SolidsMaterials Science Forum, 1997
- Positronium in Alkali HalidesJournal of the Physics Society Japan, 1988
- Elastic Constants of MgF2 Single CrystalsPhysica Status Solidi (b), 1969
- Deformation Potentials and Mobilities in Non-Polar CrystalsPhysical Review B, 1950