K-Series Fluorescence Yields of Vanadium, Manganese, and Neon

K-series fluorescence yield (wK) measurements have been made for vanadium, manganese, and neon using the proportional counter method. The values obtained are the following: vanadium, 0.304±{}0.013; manganese, 0.308±{}0.015; and neon, 0.043±{}0.004. A discussion of method and errors is given and a comparison of these values with other computed and experimental values is made.