Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 327, Issue 1, Pages 123-131Publisher
SPRINGER
DOI: 10.1007/s10967-020-07486-x
Keywords
Radiation damage; Oxidation; Copper; Raman spectroscopy; Nuclear forensics
Funding
- U.S. Department of Homeland Security (DHS) Domestic Nuclear Detection Office (DNDO) Academic Research Initiative (ARI) [2015-DN-077-ARI093]
- Integrated University Program Graduate Fellowship
- University of Tennessee Governor's Chair program
- DOE-NNSA's Office of Experimental Sciences
- DOE Office of Science [DE-AC02-06CH11357]
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The study found that accumulated damage from self-irradiation causes significant modifications in metal oxidation, with the fraction of CuO phase gradually decreasing as the damage level increases. This could potentially serve as a novel forensic signature.
Cu samples were irradiated with 10 MeV Au3+ ions at 200 degrees C to damage levels of 5, 10, and 15 displacements per atom (dpa) as an analogue to study long term self-irradiation effects of alpha-decay in Pu. Samples were then subject to accelerated aging at 350 degrees C for 1 h in air resulting in mixed oxide layer growth (Cu2O and CuO). Raman spectroscopy revealed that the CuO phase fraction was gradually decreased as the damage level increased. These findings indicate that accumulated damage from self-irradiation causes quantifiable modifications in metal oxidation that could serve as a novel forensic signature.
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