Stark-modulated spectrometer
Quick Summary
A Stark-modulated spectrometer is a type of instrument used in microwave spectroscopy. This technique involves passing microwave radiation through a gaseous sample contained within a waveguide. To enhance sensitivity, a high-voltage square wave is applied across the sample, modulating the signal. This method is used to observe the rotational spectra of molecules that possess a permanent electric dipole moment. The Stark effect itself refers to the splitting of spectral lines when atoms or molecules are exposed to a strong electric field, a phenomenon analogous to the Zeeman effect in magnetic fields.
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