Changes in g-Values, in a Spectrum, for Different Magnetic Fields

Asymmetries of Zeeman patterns and g-Values for neutral manganese

“…Vol e cannot suggest the cause for this anomalous displacem ent. The other cases are closely connected with eac h other, as Catalan and Velasco have shown, [9] and [7 , p . 200 …”

“…Suppose that the relative value of TJ is smaller than that of TJ-1 • The magn etic levels of TJ will be lower ed in value b y the repulsions due to the magnetic levels of TJ -1• The amounts of th ese displacem ents are given by eq 5 so that the final values of these perturbed magnetic levels l"~f will be (9) The whole set of magnetic levels of TJ is lowered in value b ecause the r epulsions are all in the sam e direction ; the magnitudes of these displacem ents are different for the indi vidual levels on account of th e differ ent values that the function f (M ;) has for differ ent Mrvalues. Figure / -.lb…”

“…The r esulting g-valu es are writ ten after the r esp ective normal component. Thu s, th e first componen t in The impossibility of deriving an accurate mean value, for the interval, with valu es such as 0.557 and 0.653 is evid en t. R ecently, Catalan and Velasco have shown, [8] and [9], that in cases such as th ese i t is, n ever theless , possibl e to obtain g-values from the componen ts if these ar e trea ted in separate groups, on e for each …”

The first spectrum of manganese, Mn I

“…The observations of normal Zeeman splitting in Mn I by Back [6] in 1923 were made in magnetic fields of 37,000 oersteds, whereas the Zeeman-effect spectrograms obtained by Catalán in 1949 recorded magnetic splitting in fields of 85,000 oersteds. Catalán and Velasco [23] observed changes in g -values of Mn I with magnetic fields above 80,000 oersteds which distort some Zeeman patterns. These distortions in the case of z6normalF0½° and z6normalF1½° levels were ascribed to repulsions between magnetic levels with equal M -values, belonging to adjacent levels of a spectral term, and it was shown that the theory of partial Paschen-Back effects provides a simple rule for obtaining correct g -values in spite of asymmetries in Zeeman patterns.…”

“…In most cases, the Laudé type of Zeeman pattern could be recognized and for classified lines the observed Zeeman effect confirms the classification quantitatively. Because most of the Zeeman data for Mn I have been published elsewhere [23, 24, 25, 26, 27, 28] they will not be repeated here; only the type numbers [32, 34] will be listed in our list of classified lines, and the average derived g -values in our table of spectral terms.…”