Search Results - "RUOFF, A. L"

High-pressure X-ray structural study of BeO and ZnO to 200 GPa by Mori, Y., Niiya, N., Ukegawa, K., Mizuno, T., Takarabe, K., Ruoff, A. L.

“…We have carried out high‐pressure X‐ray structural studies of BeO and ZnO up to 200 GPa to find the phase transition of BeO from the wurzite to the NaCl…”
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Evidence of an intermediate high-pressure phase in BaFBr and BaFI by Subramanian, N, Chandra Shekar, N.V, Sahu, P.Ch, Govinda Rajan, K, Ruoff, A.L

“…Structural behaviour of BaFX (X=Br or I) has been studied under pressure using powder X-ray diffraction method. Both systems show a gradual pressure-induced…”
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New high-pressure phase transition in zirconium metal by HUI XIA, DUCLOS, S. J, RUOFF, A. L, VOHRA, V. K

“…Phase transitions in the group-IV transition metal Zr were studied by the energy-dispersive X-ray diffraction technique with a synchrotron source to a pressure…”
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Solid hydrogen at 342 GPa: no evidence for an alkali metal by Ruoff, Arthur L, Narayana, Chandrabhas, Luo, Huan, Orloff, Jon

“…Solid hydrogen, an electrical insulator, is predicted to become an alkali metal under extreme compression, although controversy surrounds the pressure required…”
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Phase-transition studies of germanium to 1.25 Mbar by VOHRA, Y. K, BRISTER, K. E, DESGRENIERS, S, RUOFF, A. L, CHANG, K. J, COHEN, M. L

“…New phase transitions in Ge were observed by energy-dispersive X-ray diffraction techniques for pressures up to 125 GPa (1.25 Mbar) as follows: the beta -Sn…”
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Band-overlap metallization of BaTe by GRZYBOWSKI, T. A, RUOFF, A. L

“…Energy-dispersive X-ray diffraction studies have been made on BaTe to 410 kbar. It undergoes a first-order phase transition from the sodium chloride structure…”
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Phase transformation of BeS and equation-of-state studies to 96 GPa by Narayana, C., Nesamony, V. J., Ruoff, A. L.

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Phonon reflectivity behavior in CsH and CsD at megabar pressures: Phonons in the near IR ( λ = 1 – 2 μm) by Ruoff, A.L., Ghandehari, K., Luo, H., Trail, S.S., DiSalvo, F.J., Bucher, G.L.

“…Reflectivity at the diamond-sample interface was measured for CsH at P = 0, 102, 177 and 251 GPa and for CsD at 137 GPa in the energy range 0.5–2.5 eV. The…”
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High Pressures on Small Areas by Ruoff, A. L., Wanagel, J.

“…Small diamond indentors with spherical tips were pressed against a polished diamond flat. Pressures were calculated from Hertz contact theory. Very high…”
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Crystal Structures at Megabar Pressures Determined by Use of the Cornell Synchrotron Source by Yohra, Yogesh K., Brister, Keith E., Weir, Samuel T., Duclos, Steven J., Ruoff, Arthur L.

“…X-ray diffraction studies have been carried out on alkali halide samples 10 micrometers in diameter (volume 10$^{-9}$ cubic centimeter) subjected to megabar…”
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β-Po phase of sulfur at 162 GPa : X-ray diffraction study to 212 GPa by HUAN LUO, GREENE, R. G, RUOFF, A. L

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Multimegabar pressures using synthetic diamond anvils by RUOFF, A. L, VOHRA, Y. K

“…Synthetic type 1B yellow diamonds containing nitrogen in single substitutional form, with extremely low birefringence, were used as anvils in a diamond anvil…”
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Etching of diamond with argon and oxygen ion beams by Whetten, T. J., Armstead, A. A., Grzybowski, T. A., Ruoff, A. L.

“…The angular dependences of the sputter yield of (100) single crystal diamond under argon and oxygen ion beams were investigated. For argon ion beams a large…”
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Instability of the CsCl structure in ionic solids at high pressures by VOHRA, Y. K, DUCLOS, S. J, RUOFF, A. L

“…It is shown by a simple model calculation that the ionic solids in the CsCl phase transform discontinuously to a tetragonal phase under high pressures at a…”
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The bulk modulus of C60 molecules and crystals : a molecular mechanics approach by RUOFF, R. S, RUOFF, A. L

“…In this letter, the bulk modulus of an individual C60 molecule is calculated in terms of the C,C bond force constant. A range of values for the bulk modulus is…”
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Phase transformation of BeSe and BeTe to the NiAs structure at high pressure by Luo, H, Ghandehari, K, Greene, RG, Ruoff, AL, Trail, SS, DiSalvo, FJ

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Diffusion of reactive ion beam etched polymers by TEAD, S. F, VANDERLINDE, W. E, RUOFF, A. L, KRAMER, E. J

“…The diffusion of deuterated polystyrene (d-PS) in a polystyrene matrix was used to probe the damage to the polymer surface caused by reactive ion beam etching…”
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Nature of the state of stress produced by xenon and some alkali iodides when used as pressure media by ASAUMI, K, RUOFF, A. L

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High pressure X-ray and Raman study of ZnSe by Greene, Raymond G., Luo, Huan, Ruoff, Arthur L.

“…ZnSe has been studied in a diamond anvil cell by energy dispersive X-ray diffraction with a synchrotron source to 120 GPa and by Raman spectroscopy to 11 GPa…”
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Phase Transitions in III-V Compounds to Megabar Pressures by Ruoff, A L, Li, T

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