Abstract
A super-regenerative spectrometer with two cavity grid-separation oscillator of a lighthouse tube was constructed and operated in the frequency region between 700 Mc and 1000 Mc. With this spectrometer, nuclear quadrupole resonances of I 127 in solid NH 4 I 3 and ICI were observed. The coupling constants for NH 4 I 3 and ICI were 2440 Mc and 3008 Mc at room temperature and the asymmetry parameters were 1.8 percent and 2.0 percent respectively.
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