Reflectivity of Silver Chloride in the Ultraviolet*

Abstract
The reflectivity of silver chloride was measured at room temperature and at temperatures near those of liquid nitrogen and liquid helium over the wavelength range 2150–3750 A. The reflectivity-transmission cryostat used in making these measurements is described. The results at room temperature show the presence of a reflectivity peak around 2600 A, which is in the vicinity of the first absorption peak. The reflectivity peak sharpens and shifts to shorter wavelengths, attaining a value of nearly 40% at 2300 A when close to liquid helium temperature.