Göhring oswald (1 Ergebnisse)

Physik. Zschr., 14/18. - Leipzig, Verlag von S. Hirzel, 15. September 1913, 8°, pp.857-912, 4 Tafeln, Rückenbroschur; St.a.Tit. First Edition! "In attempting to find uranium X2, Fajans and Göhring **) applied the generalization *) that after a beta transformation the daughter element is electrochemically more noble than the mother element. A solution of uranium X was placed in a lead dish, with the expectation that "ekatantalum" is more, thorium less, noble than lead. In fact, radioactive material was formed on the surface of the lead dish and its ß- activity decayed with the previously not known half life, 1.1 min. Its chemical nature was further confirmed ***) by its coprecipitation from solution with hydrous tantalum(V) oxide. Because uranium X2 occupied a previously vacant space in the periodic system (it constituted a new element), the nuclide received6 the distinctive name brevium (Bv), suggested by its short life." *) Fajans, K., Physik. Z., 14,136 (1913). **) Fajans, K., and Göhring, O., Naturwissenschaft, 1, 399 (1913). ***) Fajans, K., and Göhring, O., Physik. Z., 14, 877 (1913). "In 1913 Kazimierz (Kasimir) Fajans (1887-1975) and Oswald Göhring (1889-c.1915) discovered the element number 91as its short-lived isotope 234mPa. They named it brevium (Bv). The discovery was the result of the displacement law discovered by Alexander Smith Russell, Frederick Soddy and Fajans. According to this law and the periodic system of Dimitri Mendeleev the daughter of uranium UX must contain an unknown radioelement chemical similar to tantalum. In 1918 during the search of the mother of actinium Otto Hahn and Lise Meitner found the long-lived Isotope of Brevium (231Pa), which they designated as protactinium. Later often is written, that Hahn and Meitner have non-only given the name but also discovered the element number 91" Siegfried Niese: Die Entdeckung des Elementes 91 durch Kasimir Fajans und Oswald Göhring im Jahr 1913 und die Namensgebung durch Otto Hahn und Lise Meitner 1918.…