Marked differences in the 3p photoabsorption between the Cr and Mn⁺ isoelectronic pair: reasons for the unique structure observed in Cr
Cooper, J., Clark, C., Cromer, C., Lucatorto, T., Sonntag, B., Kennedy, Eugene T. and Costello, John T.
(1989)
Marked differences in the 3p photoabsorption between the Cr and Mn⁺ isoelectronic pair: reasons for the unique structure observed in Cr.
Physical Review A, 39
(11).
pp. 6074-6077.
ISSN 0556-2791
Chromium is the only member of the transition-group elements with a well developed Rydberg structure appearing in its 3p-absorption spectrum. New high-resolution measurements of Mn, Mn+, and Cr have revealed weak Rydberg structure in Mn+ and an analysis of the data shows that the anomalous Cr 3p absorption spectra is due to a unique relationship between its energy levels, and not to the previously supposed fact that Cr has an unpaired 4s electron.