A Two-Crystal Spectrometer for X-Rays of Wave-Length 0.030<λ<0.215A

Abstract
A two‐crystal x‐ray spectrometer for use in the wave‐length region 0.030<λK limits of lead and of uranium, and the Kα and Kβ‐lines of tungsten were observed for the purpose of calibrating the spectrometer. The resolving power of the instrument with the present crystals is discussed.