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The local metallicities of Hf(0.97)Gd(0.03)O(2), Ga(0.97)Gd(0.03)N, Eu(0.97)Gd(0.04)O and EuO films were studied through a comparison of the findings from constant initial state spectroscopy using synchrotron light. Resonant enhancements, corresponding to the 4d → 4f transitions of Eu and Gd, were observed in some of the valence band photoemission features.(More)
We review the pyroelectric properties and electronic structure of Li 2 B 4 O 7 (110) and Li 2 B 4 O 7 (100) surfaces. There is evidence for a pyroelectric current along the [110] direction of stoichiometric Li 2 B 4 O 7 so that the pyroelectric coefficient is nonzero but roughly 10 3 smaller than along the [001] direction of spontaneous polarization. Abrupt(More)
"The chromium site in doped glassy lithium tetraborate" (2014). Peter Dowben Publications. Paper 261. h i g h l i g h t s g r a p h i c a l a b s t r a c t Adoption of the Li þ site for chromium dopants in lithium tetraborate identified. Increased oxygen coordination for glass over the crystalline lithium tetraborate. Distortions about the doping chromium(More)
The unoccupied electronic structure characterization of hydrothermally grown ThO 2 single crystals" (2014). Peter Dowben Publications. Paper 265. 1 Introduction It is often stated that Th has no 5f electrons and instead adopts the electronic configuration [Rn]6d 2 7s 2. This is an extension of the idea that there are no occupied Th valence states when Th is(More)
This study combines electron microscopy equipped with energy dispersive spectroscopy to probe major element composition and autoradiography to map plutonium in order to examine the spatial relationships between plutonium and fallout composition in aerodynamic glassy fallout from a nuclear weapon test. A sample set of 48 individual fallout specimens were(More)
The four dopants (Nd, Gd, Dy, and Er) substitutionally occupy the Li + sites in lithium tetraborate (Li 2 B 4 O 7 : RE) glasses as determined by analysis of the extended X-ray absorption fine structure. The dopants are coordinated by 6-8 oxygen at a distance of 2.3 to 2.5 Å, depending on the rare earth. The inverse relationship between the RE-O coordination(More)
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