103064-02
The Constitution of Atmospheric Neon. SS. 449-455. Mit 2 Tafeln. - Und: Derselbe. The Mass-Spectra of Chemical Elements. SS. 611-625. In: Philosophical Magazine and Journal of Science. 6th Series. Vol. 39, No. 232 und 233 in 2 Heften.
London, Taylor & Francis, 1920. - (22,5 x 14,5 cm). SS. (385)-632. Mit zahlreichen Abbildungen und Tafeln. Original-Broschuren.
Zu I: Erste Ausgabe dieser bedeutenden Bestätigung seiner Isotopenhypothese. - "In 1919, to test the neon isotope hypothesis, Aston built a positive ray spectrograph, or mass spectrograph with a resolving power of 1 in 100 and an accuracy of 1 (ppm)... Aston adopted several methods to calculate the masses of the particles.... In the case of neon, the intensities of the 20 and 22 mass lines implied a relative abundance of about 10:1, enough to produce an average mass of 20.2, the known atomic weight of neon. Neon was isotopic" (DSB). - Wohlerhalten. - DSB 1, 320; vgl. PMM 412
The Constitution of Atmospheric Neon. SS. 449-455. Mit 2 Tafeln. - Und: Derselbe. The Mass-Spectra of Chemical Elements. SS. 611-625. In: Philosophical Magazine and Journal of Science. 6th Series. Vol. 39, No. 232 und 233 in 2 Heften.
London, Taylor & Francis, 1920. - (22,5 x 14,5 cm). SS. (385)-632. Mit zahlreichen Abbildungen und Tafeln. Original-Broschuren.
Zu I: Erste Ausgabe dieser bedeutenden Bestätigung seiner Isotopenhypothese. - "In 1919, to test the neon isotope hypothesis, Aston built a positive ray spectrograph, or mass spectrograph with a resolving power of 1 in 100 and an accuracy of 1 (ppm)... Aston adopted several methods to calculate the masses of the particles.... In the case of neon, the intensities of the 20 and 22 mass lines implied a relative abundance of about 10:1, enough to produce an average mass of 20.2, the known atomic weight of neon. Neon was isotopic" (DSB). - Wohlerhalten. - DSB 1, 320; vgl. PMM 412
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