Prediction of the thermal release of transactinide elements (112 ≤ Z ≤ 116) from metals

Wittwer, D.; Dressler, R.; Eichler, R.; Gäggeler, H. W.; Türler, A. (2013). Prediction of the thermal release of transactinide elements (112 ≤ Z ≤ 116) from metals. Radiochimica Acta, 101(4), pp. 211-219. Oldenbourg Wissenschaftsverlag GmbH 10.1524/ract.2013.2027

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Wittwer, David; Eichler, Robert and Türler, Andreas

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

2193-3405

Publisher:

Oldenbourg Wissenschaftsverlag GmbH

Language:

English

Submitter:

Franziska Bornhauser-Rufer

Date Deposited:

04 Apr 2014 19:43

Last Modified:

27 Apr 2018 10:32

Publisher DOI:

10.1524/ract.2013.2027

Uncontrolled Keywords:

SHE, Solid catcher, Vacuum chromatography, Diffusion

BORIS DOI:

10.7892/boris.46209

URI:

https://boris.unibe.ch/id/eprint/46209

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