Die allgemeine Intensitätsverteilung in der kohärent ausgeleuchteten Umgebung einer Kaustikfläche

It is found that in the case of coherent irradiation the intensity distribution in the near vicinity of any regular caustic surface is described by the same Airy integral. The scale in which the distance of intensity maxima and minima is measured depends only on the wave length and the difference of the curvatures of the tangent electron ray and the circle of curvature to which this ray is tangent. This result is confirmed by a simple light optical experiment. For the case of a charged particle in a homogeneous field the result of a direct wave mechanical calculation is in agreement with the above approximation in which some concepts of geometrical optics were used.     

Energieanalyse im Elektronenstreudiagramm einer dünnen Silizium-Folie

The energy distribution of electrons (47 keV) scattered by thin foils of silicon was measured by means of an electrical retarding field. Laue spots, Kikuchi lines and the region of the background near the primary spot from where the Kikuchi line originates, were investigated. The spectra show characteristic differences indicating a high portion of multiple energy-losses (of 16,9 eV) in the Kikuchi lines and in the background region, and a small portion in the Laue spots, indicating the different ways by which electrons are scattered into the various scattering angles.     

Die Veränderung einer Metalloberfläche nach der Elektronenemission unter atmosphärischen Bedingungen

Ohne Zusammenfassung

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Rundtischgespräche

Separation of cesium and cobalt from simulated medium active waste (MAW) by coprecipitation with hexacyanocobaltate (III) salts has been discussed. It has been found that coprecipitation of cesium or cobalt from MAW can be carried out successfully by using only potassium hexacyanocobaltate (III). The retention of cesium and cobalt has been studied over a wide range of pH, from zero to 12. A comparison of cobalti-, ferro- and ferricyanide complexes towards the retention of cesium at different pH values has also been made. The retention capacity of cobalticyanide precipitates for cesium and cobalt at pH 1.6 has been reported.