Page "government" Paragraph 267
from
Brown Corpus
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; ;
therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
Since conventional methods are insensitive at the low frequencies of these molecular transitions, the paramagnetic resonance method is being used instead.
This involves the application of a strong magnetic field to the radical vapor, which shifts the low-frequency spectra to a conveniently high microwave range, where they may be measured with optimum sensitivity.
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