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RESEARCH PRODUCT
Positron detrapping from defects: A thermodynamic approach
Risto M. NieminenMatti Manninensubject
Thermal equilibriumPhysics and Astronomy (miscellaneous)ChemistryBinding energyGeneral EngineeringGeneral ChemistryTrappingPositroniumCondensed Matter::Materials SciencePositronLattice defectsDesorptionVacancy defectPhysics::Atomic and Molecular ClustersGeneral Materials ScienceAtomic physicsdescription
The rate of positron detrapping in thermal equilibrium from lattice defects has been calculated by relating it to the specific trapping rate. The results for vacancies, dislocations and surfaces each show a different temperature dependence for the escape rate. For vacancies a measure of the importance of the detrapping can be obtained from the ratio of the vacancy formation energy to the positron binding energy in the defect. The positronium desorption rate from a surface is also calculated and agreement with experimental results is found.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1981-10-01 | Applied Physics A Solids and Surfaces |