Abstract
A completely electronic sweep spectroscope of high resolution has been developed for the wave-length region from 2 to 3 millimeters (150,000 mc/sec. to 100,000 mc/sec.). The radiation source is a silicon crystal harmonic generator driven by Ratheon klystrons. Silicon crystals are used also as detectors. Radiation of wave-length 1.96 mm (154,000 mc/sec.) has been generated and detected with strength more than ten times the noise level. Some lines in the hyperfine structure of the rotational transition of ICN at 2.32 mm have been observed. The transition of CF has been observed at 2.93, and the separation of the and lines has been determined as 1.8 mc. Precision measurements on the first rotational line () of , and in the 2.6-mm region have been made with an electronic frequency standard monitored by the 10 mc/sec. signal of station WWV. The following molecular constants were determined: for , , , g , g , , ; for , g , . The last three digits quoted for and have relative significance only, because of possible error in Planck's constant.
- Received 10 January 1950
DOI:https://doi.org/10.1103/PhysRev.78.140
©1950 American Physical Society