With a high-vaeuum spectrograph of a modified Siegbahn type using a bent mica crystal focussing in the direction towards the spectral line and wave-lengths simultaneously, the non-diagram line of Kα-series of F(9) were newly detected. And by use of semi-Moseley diagram their assignment has been done as they are homolog of Kα', α₂, α₄ of higher element. And the form of the Kα-lines of F and wave-lengths in many of its compounds such as LiF, NaF, KF, 2BeO-5BeF₂, CaF₂, BaF₂, AlF₃, K₂AlF₆ and F₂TaF₇. were determined microphotometrically, use being made of a step-sector dises and the half-width determined. Also the intensities relative to that of the FKα_{1, 2} line were measured for the Kα non-diagram line of various fluorine compounds.
The main result obtained are as follows:
(1) for all compounds in which the metal has the same valence, rather regular increase of wave-length of the FKα line with atomic number of the metallic atom was observed, (2) metallic atoms with different valencies has a tendency to shift towards shorter wave-length with valency; (3) the bandwidths of FKα_{1, 2} line changes linearly with the reciprocal of the distance between closest neighbours; (4) the intensities of the FKα_{3, 4} lines relative to that of FKα_{1, 2} changes from compound to compound in pecnliars manner.
The latter phenomena was explained on the basis of the de-excitation of the initial state (1s2p) of Kα_{3, 4} lines by an electron from the next atom by leakage through potential varrier between them and the quenching of the Kα_{3, 4} line occurs, which lead to conclusion that the anti-electron is conducted through the lattice and also as a measure of the degree of polarity

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Mittels der von BEACH und PALMER zur Erklarung der Intensitatsverteilung der Elektroneninterferenzen ausgerechneten Potentialkurve ist die Temperaturabhangigkeit des Dipolmoments des Dichlorathans abgeleitet. Es stellt sich heraus, dass diese Potentialkurve der Erklarung der experimentellen Resultaten nicht anpassend ist. Weiter wird gezeigt, dass, solange es die Temperaturabhangigkeit des Dipolmoments betrifft, sowohl die experimentellen als auch die verfeinerten theoretischen Resulteten durch einfachen Ansatz der Potentialkurve vom cos-Typ genugend approximiert werden

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Peculiar shape of the curve showing the intensities of the non-diagram lilies of Kα series as a function of atomic number has been reported by C. H. SHOW and L. G. PARRATT, and M. SAWADA and J. KAKINOKI.
And also noticeable change in intensity was observed in non-diagram lines of F(9) in various compounds by M. SAWADA, Z. FURUTA and J. KOSUGI.
To explain these curious dependency on atomic number, estimations was carried out for the probability of the de-excitation of the doubly ionized state which was customary believed to be the initial state of these non-diagram lines. On the basis of the idea of the de-excitation of doubly ionized state, takink into consideration of the de-excitation the shape of the above-nientioned curve was explained qualitatively

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Atomic cross sections σγ's of Mg, Co and Bi for gamma-ray excitation by fast neutrons of different energies from 2.25 to 2.90MeV were determined. In all three cases anormalics were observed in the cross section energy curves. In the case of Mg, the anormaly observed by MACPHAIL in the total cross section σ_t can be explained almost entirely by that in σγ observed in the present experiment. As Co consists of nearly, and Bi of perfectly single isotope, the results are suited for comparison with theoretical calculations

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