Search Results - "Vallery, R."

Resolution of the orthopositronium-lifetime puzzle by Vallery, R S, Zitzewitz, P W, Gidley, D W

“…The long-standing discrepancy [G. S. Adkins, R. N. Fell, and J. Sapirstein, Ann. Phys. (N.Y.) 295, 136 (2002)]] between the theoretical calculations of the…”
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Temperature effects on the structure and mechanical properties of vapor deposited a-SiO2 by Jambur, V., Molina-Ruiz, M., Dauer, T., Horton-Bailey, D., Vallery, R., Gidley, D., Metcalf, T.H., Liu, X., Hellman, F., Szlufarska, I.

“…•Density of vapor deposited a-SiO2 films increases with increasing growth temperature in spite of increasing porosity and size of nanovoids.•Increased density…”
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Thermalization of Positronium in Gases by Skalsey, M., Engbrecht, J. J., Bithell, R. K., Vallery, R. S., Gidley, D. W.

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Immobilized Polymer Layers on Spherical Nanoparticles by Harton, Shane E, Kumar, Sanat K, Yang, Hoichang, Koga, Tadanori, Hicks, Kyle, Lee, HyungKi, Mijovic, Jovan, Liu, Ming, Vallery, Richard S, Gidley, David W

“…Polymer properties, such as their mechanical strength, barrier properties, and dielectric response, can be dramatically improved by the addition of…”
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Precision lifetime measurements of a single trapped ion with ultrafast laser pulses by Moehring, D. L., Blinov, B. B., Gidley, D. W., Kohn, R. N., Madsen, M. J., Sanderson, T. D., Vallery, R. S., Monroe, C.

“…We report precision measurements of the excited state lifetime of the 5p {sup 2}P{sub 1/2} and 5p {sup 2}P{sub 3/2} levels of a single trapped Cd{sup +} ion…”
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Doppler-broadening measurements of positronium thermalization in gases by Skalsey, M., Engbrecht, J. J., Nakamura, C. M., Vallery, R. S., Gidley, D. W.

“…The formation and subsequent thermalization of positronium (Ps) produced at a few eV in gases are investigated using time-resolved Doppler-broadening…”
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Characterization of fatigue-induced free volume changes in a bulk metallic glass using positron annihilation spectroscopy by Vallery, R. S., Liu, M., Gidley, D. W., Launey, M. E., Kruzic, J. J.

“…Depth-profiled Doppler broadening spectroscopy of positron annihilation on the cyclic fatigue-induced fracture surfaces of three amorphous Zr 44 Ti 11 Ni 10 Cu…”
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Implementation of a prototype slow positron beam at the NC State University PULSTAR reactor by Hathaway, A.G., Skalsey, M., Frieze, W.E., Vallery, R.S., Gidley, D.W., Hawari, A.I., Xu, J.

“…A prototype beam system was designed and tested to verify the potential of utilizing the North Carolina State University PULSTAR reactor in generating slow…”
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Deducing nanopore structure and growth mechanisms in porogen-templated silsesquioxane thin films by Peng, Hua-Gen, Vallery, Richard S., Liu, Ming, Frieze, William E., Gidley, David W., Yim, Jin-Heong, Jeong, Hyun-Dam, Kim, Jongmin

“…Adjusting the functional group of a porogen is found to have a tremendous effect on the pore structre of porous low dielectric constant films with…”
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Revealing hidden pore structure in nanoporous thin films using positronium annihilation lifetime spectroscopy by Peng, Hua-Gen, Frieze, William E., Vallery, Richard S., Gidley, David W., Moore, Darren L., Carter, Richard J.

“…The highly inhomogeneous pore morphology of a plasma-enhanced-chemical-vapor-deposited ultralow-k dielectric film (k=2.2) has been revealed using…”
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Calixarene Derivatives as Novel Nanopore Generators for Templates of Nanoporous Thin Films by Yim, Jin-Heong, Kim, Jongseob, Gidley, David. W., Vallery, Richard S., Peng, Hua-Gen, An, Duk Keun, Choi, Byoung-Ki, Park, Young-Kwon, Jeon, Jong-Ki

“…We report herein calixarene derivatives, which could adapt to various fields of application, as novel pore generators for making nanoporous materials. The pore…”
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Precision lifetime measurements of a single trapped ion with ultrafast laser pulses by Moehring, D. L, Blinov, B. B, Gidley, D. W, KohnJr, R. N, Madsen, M. J, Sanderson, T. D, Vallery, R. S, Monroe, C

“…Phys. Rev. A 73, 023413 (2006) We report precision measurements of the excited state lifetime of the $5p$ $^2P_{1/2}$ and $5p$ $^2P_{3/2}$ levels of a single…”
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