Research Information System
10th European Conference on Atoms, Molecules and Photons (ECAMP X), Spain, 1 - 04 July 2010, pp.106, (Summary Text)
Hyperfine structure of Niobium was investigated in the wavelength range from 563 nm to 617 nm with laser-induced fluorescence spectroscopy using a ring-dye laser with the dye Rhodamine 6G and the dye Kiton Red. The Nb vapour was generated in a hollow cathode lamp, which was cooled with liquid nitrogen. The hollow cathode lamp was operated at a current of about 60 mA with Argon pressure 0.8 mbar.
The spectra of Niobium were fitted with Voigt profile using the program Fitter [1] for the determination of magnetic dipole hyperfine constants A of upper and lower levels. The classification program [2] was used to show suggestions for flourescence lines in accordance with the current classified. For wavelengths, intensities and classifications, we follow the list of Humphreys and Meggers [3]. We have measured new wavelengths which are listed in none of the wavelength tables [3, 4]. For these unclassified lines we determined upper and lower levels using the classification program [2]. Experimental hyperfine constants A of the isotope 93Nb have been determined for 64 levels of odd parity and 9 levels of even parity. From those values 24 magnetic dipole constants have been determined for the first time.