James C. Petrosky

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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)
"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 effective Debye temperatures ([Formula: see text]) of the surface region of UO2 single crystals, prepared by the hydrothermal synthesis technique, were obtained from temperature-dependent x-ray photoemission in the temperature range of 300 K-623 K. A lattice stiffening transition, characterized by different regions of different effective Debye(More)
Gd(2)O(3) and Gd-doped HfO(2) films were deposited on p-type silicon substrates in a reducing atmosphere. Gd 4f photoexcitation peaks at roughly 7 and 5 eV below the valence band maximum have been identified using the resonant photoemission of Gd(2)O(3) and Gd-doped HfO(2) films, respectively. In the case of Gd(2)O(3), strong hybridization with the O 2p(More)
Secure communications are critical for many applications. While natural ionospheric effects will be negligible on frequencies above 30 GHz, amplitude scintillation caused by a high altitude nuclear event (HANE) could degrade communication links. Amplitude scintillation is modeled using the multiple phase screen method. The results show that after a HANE,(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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