caa a22 4500 37889725X CHVBK 20180305123509.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1524/ract.92.12.917.55105 doi (NATIONALLICENCE)gruyter-10.1524/ract.92.12.917.55105 Investigation of evaporation characteristics of polonium and its lighter homologues selenium and tellurium from liquid Pb-Bi-eutecticum [Elektronische Daten] [Jörg Neuhausen, U. Köster, B. Eichler] The evaporation behaviour of polonium and its lighter homologues selenium and tellurium dissolved in liquid Pb-Bi-eutecticum (LBE) has been studied at various temperatures in the range from 482K up to 1330K under Ar/H2 and Ar/H2O-atmospheres using γ-ray spectroscopy. Polonium release in the temperature range of interest for technical applications is slow. Within short term (1h) experiments measurable amounts of polonium are evaporated only at temperatures above 973K. Long term experiments reveal that a slow evaporation of polonium occurs at temperatures around 873K resulting in a fractional polonium loss of the melt around 1% per day. Evaporation rates of selenium and tellurium are smaller than those of polonium. The presence of H2O does not enhance the evaporation within the error limits of our experiments. The thermodynamics and possible reaction pathways involved in polonium release from LBE are discussed. © 2004 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Neuhausen Jörg aut Köster U. aut Eichler B. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/12/2004(2004-12-01), 917-923 0033-8230 92:12/2004<917 2004 92 ract https://doi.org/10.1524/ract.92.12.917.55105 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.92.12.917.55105 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Neuhausen Jörg aut NATIONALLICENCE 700 1- Köster U. aut NATIONALLICENCE 700 1- Eichler B. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/12/2004(2004-12-01), 917-923 0033-8230 92:12/2004<917 2004 92 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter