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Table 1:

Nb I transitions investigated by means of Fourier transform spectroscopy.

Notes. Wavelength in air $\lambda_{\rm air}$, wavenumbers $\tilde{\nu}$, intensities, and level energies E according to Humphreys & Meggers (1945), centre of gravity  $\tilde{\nu}_{\rm fit}$resulting from the hyperfine structure fit and $\Delta \tilde{\nu} = E_u - E_l -\tilde{\nu}_{\rm fit} $.
$^{(\dag )}$Wrong classification given in Humphreys & Meggers (1945); (*) FWHM and ratio between Gaussian and Lorentzian FWHM fixed during the fit; r: self-reversal line; c: complex line; d: double line.

Source LaTeX | All tables | In the text

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