1000 resultados para 1995_08090102 CTD-116 4902802


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Metallic catcher foils have been investigated on their thermal release capabilities for future superheavy element studies. These catcher materials shall serve as connection between production and chemical investigation of superheavy elements (SHE) at vacuum conditions. The diffusion constants and activation energies of diffusion have been extrapolated for various catcher materials using an atomic volume based model. Release rates can now be estimated for predefined experimental conditions using the determined diffusion values. The potential release behavior of the volatile SHE Cn (E112), E113, Fl (E114), E115, and Lv (E116) from polycrystalline, metallic foils of Ni, Y, Zr, Nb, Mo, Hf, Ta, and W is predicted. Example calculations showed that Zr is the best suited material in terms of on-line release efficiency and long-term operation stability. If higher temperatures up to 2773 K are applicable, tungsten is suggested to be the material of choice for such experiments.

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Die Foliierung geht nur bis Bl. 191; zusätzlich gibt es das Blatt 101a.

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Vorbesitzer: Eljāqīm Carmoly; Abraham Merzbacher

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Vorbesitzer: Bartholomaeusstift Frankfurt am Main

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Vorbesitzer: Dominikanerkloster Frankfurt am Main;

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u.a.: Hübbe; Baron de Flaming; Heinrich August Carl Ganslandt;

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Genesungswünsche (Gedicht)

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Vorbesitzer: Philippus Didilsheim; Laurentius Bulla; Johannes Rodenbeck

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Vorbesitzer: Johann Maximilian Zum Jungen