Temperature dependence of slow positron reemission from metals

TL;DR

This paper presents a simple model explaining how the slow positron reemission yield from metals varies with temperature, predicting optimal temperatures for maximum yield and aligning with experimental data.

Contribution

A novel model is proposed to predict temperature-dependent positron work function and reemission yield in metals.

Findings

Model accurately predicts temperature dependence of positron yield.

Critical temperatures for maximum positron reemission are calculated.

Model aligns with experimental observations.

Abstract

Intensity of positron reemission from a metal is related to its work function. This property is dependent on temperature and can be modified with temperature control. In this article a simple model is proposed to explain and predict the variation of the positron work function with temperature. The dependence of slow positron yield of metals on temperature is predicted based on this model and the critical temperatures at which the slow positron yield is maximum is calculated. The proposed model is consistent with experimental observations.