Autoionization resonances and configuration-mixing in the emission spectra of Zn I and Cd I

From new emission spectra of Cd I and Zn I the nsnp 1 P 0 -np 2 3 P 2 features have been identified in each case ( n = 4 for Zn and n = 5 for Cd). Absolute photometric study of the resonances has proved that they have the same half-widths as their shorter-wavelength companions nsnp 3 P 0 -np 2 3 P 2 . The measured auto-ionization probability for the Cd I 5p 2 3 P 2 level is 4.15 x 10 13 s -1 and for the Zn I 4p 2 3 P 2 level is 4.84 x 10 12 s -1 . From the absolute intensity measurements we have determined the configuration-mixing coefficients and, for Cd I, the capture cross-section for the 5sE(d) 1 D 2 continuum associated with the resonance at 310.7 nm.