研摩した銅表面に埋め込まれたエメリー粒子からのエキゾ電子放射

抄録

The exoelectron emission from abrasive particles embedded in copper surfaces after abrasion with emery papers was measured using a gas-flow type G-M counter. The emission intensity was found to decrease with time at room temperature approximately according to the logarithmic decay law, but the emission was scarcely decayed at the liquid nitrogen temperature. Initial emission counts for first 10 minutes increased with increasing in the size of abrasive particles of emery paper. There were three marked peaks in the TSEE glow curve; at around 80°, 220° and 350°C. The peaks shifted with the time of storing in air after abrasion. Integrated total emission counts of the glow curve considerably decreased with the time of storing in air after abrasion. As the linear relationship was obtained between initial emission counts for first 5 minutes and integrated total emission counts of the glow curve from room temperature to 250°C, integrated total emission counts on heating were able to be estimated from the measurement of initial emission counts at room temperature. Initial emission counts varied between copper samples. The measurement of the exoelectron emission at room temperature is considered to be a simple and convenient method to evaluate properties of abraded metal surfaces.