Monte Carlo simulation of secondary electron emission from tungsten surfaces with various work functions as applied to Sc/W surfaces

To elucidate the secondary electron emission from tungsten surfaces of various work functions, as experimentally prepared by scandium deposition onto a W(100) surface, a Monte Carlo simulation of energy distribution of secondary electrons, N-S(E), emitted from tungsten surfaces with various work functions has been performed for comparison with the measured distribution from a Sc/W(100) surface. The Monte Carlo simulation described the shift of the onset of N-S(E) with considerable success and, furthermore, successfully predicted the appearance of a hump at around 20 eV in N-S(E), which has long been a question awaiting explaination.