Distribution and surface enrichment of radionuclides in lead-bismuth eutectic from spallation targets

Hammer-Rotzler, Bernadette; Neuhausen, Jörg; Boutellier, Viktor; Wohlmuther, Michael; Zanini, L.; David, J. -C.; Türler, Andreas; Schumann, Dorothea (2016). Distribution and surface enrichment of radionuclides in lead-bismuth eutectic from spallation targets. European physical journal - plus, 131(7), p. 233. EDP Sciences 10.1140/epjp/i2016-16233-1

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With the development of new high-power neutron spallation sources --both for scientific application and as neutron production tool for accelerator-driven systems-- the demand for experimentally obtained nuclear data on the residue nuclei production in the target is constantly increasing. In the present work, we examined two lead-bismuth-eutectic targets, irradiated with high-energy protons, concerning their radionuclide content and the spatial distribution of selected isotopes. The first one was the so-called ISOLDE target, being irradiated with 1-1.4GeV protons at CERN-ISOLDE, the second one was the MEGAPIE target, irradiated at PSI with 590MeV protons. In particular, we investigated the phenomenon of radionuclide enrichment on free surfaces in both targets. It turned out that considerable accumulation can be found especially in the case of lanthanides. The depletion process is enhanced at increased temperatures. The results are compared with theoretical predictions; some possible consequences of the findings are illustrated.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Türler, Andreas

Subjects:

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

ISSN:

2190-5444

Publisher:

EDP Sciences

Language:

English

Submitter:

Franziska Bornhauser-Rufer

Date Deposited:

24 Jan 2017 09:22

Last Modified:

29 Jan 2017 02:13

Publisher DOI:

10.1140/epjp/i2016-16233-1

BORIS DOI:

10.7892/boris.93789

URI:

https://boris.unibe.ch/id/eprint/93789

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