Einsatzmöglichkeiten eines Fenster-Auslösezählrohres im Bereich der beschränkten Proportionalität)

In der Kernstrahlungs-Meßtechnik erweist es sich in vielen Fällen als zweckmäßig und vorteilhaft, den Bereich der besehränkten Proportionalität eines Fenster-Auslösezählrohres auszunutzen. Nimmt man die Charakteristik eines Fenster-Auslösezählrohres für einen reinen α-Strahler auf, so ergeben sich die Kurven α der Abbildung. Verwendet man einen reinen β-Strahler, so ergeben sich die Kurven β.     

Höhere Anregungszustände von Farbzentren

In additively colored KCl, KBr, KI, RbCl, RbBr and RbI the absorption on the short-wave side of the F-band was investigated. Besides the K band three new absorption peaks L₁, L₂ and L₃ were found, all in a fixed relation to the F band. The experimental data indicate that K, L₁, L₂ and L₃ are transitions of the F electron to higher excited states, the three highest of which are conductive states. By comparing the absorption band areas the relative transition probabilities to the different excited states were obtained.     

Anmerkung zur Lösung der Temperaturänderung in der Positiven Säule

Ohne Zusammenfassung

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Informationsmöglichkeiten Des Radons in Unterirdischen Wässern

Abstract

The paper deals with the correlation between the Rn-concentration in underground waters and the Ra-concentration in these waters, but also the correlation between Rn-concentration in these waters and Rn-concentrations of gases in rocks around these waters. Essential for the Rn-concentration is the Ra-concentration only in such water which has an extraordinarily high Ra-concentration.

It is mentioned that ²¹⁰Pb-activity is not in balance with the Rn-activity. Solid surfaces absorb this isotope. This absorption was proved by experiments: A sample was kept in a closed bottle for eleven years, and then the concentration of ²¹⁰Pb in this water-sample was measured. Also ²¹⁰Pb and its “daughter-atoms” were searched for on the inside of the bottle. Also measurements of the Rn-concentration and other parameters were carried out in mineral springs near the river Tschicherte. The results will influence the decision, whether a health-resort will be built in this region or not.