Variation of The Photoelectric Effect with Temperature and Determination of the Long Wave-length Limit for Tungsten
The photoelectric characteristics of a tungsten surface have been studied from room temperature to 1140°K. It has been found necessary to use a tube of glass and quartz, and to seal it off the pumps after a thorough outgassing. The surface is rendered insensitive at room temperature by traces of gas, but regains its sensitivity between 800 and 900°K. The long wave-limit was found to be 2570±50A, and was independent of temperature.
©1929 The American Physical Society Received 5 November 1928 The author wishes to express his appreciation to Dr. Millikan for his constant interest and advice and for placing the facilities of the Norman Bridge Laboratory at his disposal. The help of the technical staff is also very much appreciated, particularly the ingenuity and skill of the glassblower, Mr. William Clancy.