Potassium cell at a controlled excited the K atoms , vapour, contained together with a buffer gas in a glass fluorescence temperature, was irradiated with pulsed dye-laser radiation which to the 52P,,2 or 5'P3,, state. The effective decay rate of the 5'P atoms was determined in relation to the buffer gas densities by methods of fluorescence spectroscopy with time resolution. The experiments yielded the total quenching (depopulation) cross sections of 19, 94 and 120A2 for collisions with H2, N2 and CH, molecules, respectively.
The field in a single cell of a cloverleaf accelerator structure has been calculated in a two-dimensional approximation by synthesis from the fields produced by line currents inside a metal cylinder. Effective shunt impedances at p = 0.7 fall around 25 MQ/m for the shapes considered.Cells with wide, short lobes give the best shunt impedance.
Es wird über die Darstellung eines neuen Typs anionischer Nickelpseudohalogenid‐Komplexe [Ni{N(CN)2}3]− sowie gemischter Thiocyanat‐Dicyanamid‐Komplexe [Ni{N(CN)2}2(NCS)2]2− berichtet. Die Struktur der Komplexe wird auf der Grundlage von IR‐spektroskopischen Untersuchungen sowie von magnetischen Messungen diskutiert. Die Verbindungen repräsentieren polymer oktaedrische, durch Dicyanamid‐Gruppen verbrückte Komplexe.
Es wird über Darstellung und Eigenschaften gemischter Pseudohalogeno‐kobaltate(II) [CoX2Y2]2− und [CoX3Y]2− (X = NCO, NCS; Y = N(CN)2) berichtet. Die Struktur der Komplexe wird unter Heranziehung von Elektronen‐ und Infrarotspektren sowie von magnetischen Messungen diskutiert.
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