6533b85cfe1ef96bd12bc7d9

RESEARCH PRODUCT

Quantitative analysis of rhenium in irradiated tungsten

P. WarnickeJixia LiHarry RamanantoaninaManuel A. PouchonY. Dai

subject

Nuclear and High Energy PhysicsMaterials scienceExtended X-ray absorption fine structureAbsorption spectroscopyAstrophysics::High Energy Astrophysical PhenomenaAnalytical chemistrychemistry.chemical_element02 engineering and technologyRheniumTungsten021001 nanoscience & nanotechnology01 natural sciences010305 fluids & plasmasNuclear Energy and EngineeringchemistryAbsorption edge0103 physical sciencesGeneral Materials ScienceSpallationGamma spectroscopy0210 nano-technologyAbsorption (electromagnetic radiation)

description

Abstract Pure tungsten (W), irradiated to 3.5 dpa in a target of the Swiss neutron spallation source (SINQ), was characterized using high-sensitivity HPGe gamma ray spectroscopy to identify the present radionuclides. Synchrotron X-ray absorption spectroscopy was used to quantify the amount of Re produced in the irradiated W. An atomic concentration of 0.61% Re in the irradiated W was determined from the height of the L3-edge X-ray absorption edge jump. Analysis of the local atomic structure from the extended X-ray absorption fine structure (EXAFS) spectra indicates that rhenium (Re) produced in the system is mainly coordinated by W atoms and partly coordinated by void defects. First-principles density functional theory calculations confirm a positive formation energy for a double Re defect in the system, supporting the conclusion that Re cluster formation is suppressed.

yearjournalcountryeditionlanguage
2021-10-01Journal of Nuclear Materials
https://doi.org/10.1016/j.jnucmat.2021.153014