Interferometric Measurement of Resonance Transition Wavelengths

We have made the first interferomeric measurements of the wavelengths of the important ultraviolet diagnostic lines in the spectra C IV near 155nm and Si IV near 139nm with a vacuum ultraviolet Fourier transform spectrometer and high-current discharge sources. The wavelength uncertainties were reduced by one order of magnitude for the C IV lines and by two… CONTINUE READING