Search Results - "Surko, C."

Plasma and trap-based techniques for science with positrons by Danielson, J. R., Dubin, D. H. E., Greaves, R. G., Surko, C. M.

“…The study of antimatter has been greatly advanced recently through the development of traps, which use plasma-based techniques. This article reviews the use of…”
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Resonant Annihilation and Positron Bound States in Benzene by Ghosh, S., Danielson, J. R., Surko, C. M.

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Enhanced Resonant Positron Annihilation due to Nonfundamental Modes in Molecules by Ghosh, S., Danielson, J. R., Surko, C. M.

“…Positrons attach to most molecules through Feshbach resonant excitation of fundamental vibrational modes, and this leads to greatly enhanced annihilation…”
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Similarity of Near-Threshold Energy Dependence of Positronium Formation and Photoionization in Molecules by Danielson, J R, Gribakin, G F, Arthur-Baidoo, E, Surko, C M

“…High-resolution measurements of the positronium formation cross sections for positron energies from threshold to 10 eV are presented for aniline…”
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Plans for the creation and studies of electron-positron plasmas in a stellarator by Sunn Pedersen, T, Danielson, J R, Hugenschmidt, C, Marx, G, Sarasola, X, Schauer, F, Schweikhard, L, Surko, C M, Winkler, E

“…Electron-positron plasmas are unique in their behavior due to the mass symmetry. Strongly magnetized electron-positron, or pair, plasmas are present in a…”
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Vibrational Feshbach Resonances Mediated by Nondipole Positron-Molecule Interactions by Natisin, M R, Danielson, J R, Gribakin, G F, Swann, A R, Surko, C M

“…Measurements of energy-resolved positron-molecule annihilation show the existence of positron binding and vibrational Feshbach resonances. The existing theory…”
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A cryogenically cooled, ultra-high-energy-resolution, trap-based positron beam by Natisin, M. R., Danielson, J. R., Surko, C. M.

“…A technique is described to produce a pulsed, magnetically guided positron beam with significantly improved beam characteristics over those available…”
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Dipole enhancement of positron binding to molecules by Danielson, J R, Gosselin, J J, Surko, C M

“…Measurements of positron-molecule binding energies are made for molecules with large permanent dipole moments (>2.7  D), by studying…”
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Evolution of a Vortex in a Strain Flow by Hurst, N C, Danielson, J R, Dubin, D H E, Surko, C M

“…Experiments and vortex-in-cell simulations are used to study an initially axisymmetric, spatially distributed vortex subject to an externally imposed strain…”
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Comparisons of positron and electron binding to molecules by Danielson, J R, Jones, A C L, Natisin, M R, Surko, C M

“…Positron binding to molecules is compared to the analogous electron-molecule bound states. For both, the bound lepton density is diffuse and remains outside…”
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Positron-molecule interactions: Resonant attachment, annihilation, and bound states by Gribakin, G. F., Young, J. A., Surko, C. M.

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Electron plasma orbits from competing diocotron drifts by Hurst, N C, Danielson, J R, Baker, C J, Surko, C M

“…The perpendicular dynamics of a pure electron plasma column are investigated when the plasma spans two Penning-Malmberg traps with noncoinciding axes. The…”
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Torque-balanced high-density steady states of single-component plasmas by DANIELSON, J. R, SURKO, C. M

“…Electron plasmas in a Penning-Malmberg trap are compressed radially using a rotating electric field (the "rotating-wall technique"). For large electric fields,…”
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Effect of positron-atom interactions on the annihilation gamma spectra of molecules by Green, D G, Saha, S, Wang, F, Gribakin, G F, Surko, C M

“…Calculations of γ-spectra for positron annihilation on a selection of molecules, including methane and its fluoro-substitutes, ethane, propane, butane and…”
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Role of vibrational dynamics in resonant positron annihilation on molecules by Jones, A C L, Danielson, J R, Natisin, M R, Surko, C M

“…Vibrational Feshbach resonances are dominant features of positron annihilation for incident positron energies in the range of the molecular vibrations. Studies…”
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Measuring positron-atom binding energies through laser-assisted photorecombination by Surko, C M, Danielson, J R, Gribakin, G F, Continetti, R E

“…Described here is a proposed experiment to use laser-assisted photorecombination of positrons from a trap-based beam and metal atoms in the gas phase to…”
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Inward transport and compression of a positron plasma by a rotating electric field by Greaves, RG, Surko, CM

“…Inward transport of a magnetized pure positron plasma confined in a Penning-Malmberg trap is produced by applying a rotating electric field to the plasma…”
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Positron binding to alcohol molecules by Jones, A C L, Danielson, J R, Gosselin, J J, Natisin, M R, Surko, C M

“…Results are presented for positron binding to a selection of molecules containing the hydroxyl functional group. These molecules, which span in the range of…”
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Vibrational-resonance enhancement of positron annihilation in molecules by Gilbert, S J, Barnes, L D, Sullivan, J P, Surko, C M

“…The rate of annihilation of low-energy positrons in many molecular gases is orders of magnitude larger than can be explained on the basis of simple collisions…”
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High-density fixed point for radially compressed single-component plasmas by Danielson, J R, Surko, C M, O'Neil, T M

“…Rotating electric fields are used to compress electron plasmas confined in a Penning-Malmberg trap. Bifurcation and hysteresis are observed between low-density…”
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