Thermodynamics of positronium thermal desorption from surfaces

S. Chu; A. P. Mills; C. A. Murray

doi:10.1103/PhysRevB.23.2060

Thermodynamics of positronium thermal desorption from surfaces

S. Chu, A. P. Mills, C. A. Murray

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

A formula equivalent to the Richardson-Dushman equation for thermionic emission is derived for positronium emission from metal surfaces. Data on clean copper surfaces agree with the thermodynamic equation if one takes an effective reflection coefficient of thermal Ps incident on the copper surfaces to be =0.9. For submonolayer converage of sulfur on copper, the positronium emission exceeds the simple thermodynamic limit, and the implications of this result are explored.

Original language	English (US)
Pages (from-to)	2060-2064
Number of pages	5
Journal	Physical Review B
Volume	23
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.23.2060
State	Published - Mar 1 1981
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

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10.1103/PhysRevB.23.2060

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AB - A formula equivalent to the Richardson-Dushman equation for thermionic emission is derived for positronium emission from metal surfaces. Data on clean copper surfaces agree with the thermodynamic equation if one takes an effective reflection coefficient of thermal Ps incident on the copper surfaces to be =0.9. For submonolayer converage of sulfur on copper, the positronium emission exceeds the simple thermodynamic limit, and the implications of this result are explored.

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Thermodynamics of positronium thermal desorption from surfaces

Abstract

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