Title :
The Ammonia Maser as an Atomic Frequency and Time Standard
Author :
Mockler, R.C. ; Barnes, J. ; Beehler, R. ; Salazar, H. ; Fey, L.
Author_Institution :
National Bureau of Standards, Boulder, Colo.
Keywords :
Atomic beams; Doppler shift; Frequency; Instruments; Iris; Masers; Optical coupling; Reproducibility of results; Resonance; Stability;
Journal_Title :
Instrumentation, IRE Transactions on
DOI :
10.1109/IRE-I.1958.5006788
