The Fundamental Level of the Iron Atom

Details The Fundamental Level of the Iron Atom The Fundamental Level of the Iron Atom

Mar 1926

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1926natur.117..380s&link_type=abstract

Nature, Volume 117, Issue 2941, pp. 380 (1926).

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THERE is still some difference of opinion about the fundamental level of the iron atom. From Laporte's analysis (Zeit. für Physik, 23, 135, 1924) it appears that the chief lines proceed from five fundamental levels, constituting a quintet d-group. But this is at variance with the experiments of Stern and Gerlach on the directional quantisation of atoms. Gerlach states that there is a group of strong lines at about λ = 2100 Å.U., which are not included in Laporte's classification. But Laporte, in support of his view, states that the 5D group for iron fits best with the rule given by Catalán on the normal orbits of the elements of the transitional series from potassium to nickel (Journ. Opt. Soc. America, November 1925). Laporte further states that his point of view ``is favoured by some astrophysical facts, and by the almost complete classification of the lines of iron, which now makes it improbable that any important low terms are unknown''. I am not aware of the astrophysical facts which Laporte has in view, but such facts as are available to me seem to favour the other view.

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