Beam-Type Masers for Radiofrequency Spectroscopy

抄録

Beam-type masers for radiofrequency spectroscopy of molecules are considered. The theoretical estimate of sensitivity is discussed and a table of minimum detectable beam intensity and estimate of available beam intensity for some of the low frequency transitions is given. A K-type doubling transition, 4₃₁→4₃₂, of formaldehyde was observed as an emission line at 4.5769±0.0023 Mc, and compared with theories. The observed saturation in focusing is probably due to the non-adiabatic change of rotational states in the focuser. The saturation broadening of the line with increasing rf field shows agreement with theory.