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Full-Text Articles in Physics
Effect Of Relativistic Many-Electron Interactions On Photoelectron Partial Wave Probabilities, K. W. Mclaughlin, Orhan Yenen, Duane H. Jaecks, Timothy J. Gay, M. M. Sant'anna, D. Calabrese, B. Thaden-Jordan
Effect Of Relativistic Many-Electron Interactions On Photoelectron Partial Wave Probabilities, K. W. Mclaughlin, Orhan Yenen, Duane H. Jaecks, Timothy J. Gay, M. M. Sant'anna, D. Calabrese, B. Thaden-Jordan
Timothy J. Gay Publications
We obtain relative cross sections for the production of photoelectrons with specific angular momentum quantum numbers. These cross sections are obtained from the polarization analysis of the visible fluorescence of ions produced when circularly polarized vacuum ultraviolet radiation photoionizes ground state Ar. The ratio of cross sections for the production of photoelectrons with the same orbital angular momentum but different total angular momenta shows strong deviations from the statistical ratio, demonstrating the importance of relativistic interactions in many-electron photoionization dynamics.
Determination Of Hexadecapole Moments For The 3p4(1D) Core Of Argon Ii Excited In Polarized E--Ar Collisions, B. G. Birdsey, H. M. Al-Khateeb, Timothy J. Gay
Determination Of Hexadecapole Moments For The 3p4(1D) Core Of Argon Ii Excited In Polarized E--Ar Collisions, B. G. Birdsey, H. M. Al-Khateeb, Timothy J. Gay
Timothy J. Gay Publications
We report on measurements of the integrated Stokes parameters of the light emitted from four well-LS coupled states of the 3p4(1D)4p manifold of Aril, following the simultaneous ionization and excitation of neutral argon by polarized electrons. As for all states, the state multipoles of J can be expanded in terms of the total orbital (L ) and the total spin (S) state multipoles. By splitting each L and S state multipole into multipoles for the core and outer electron, we have experimentally obtained for the first time the normalized integrated state multipole of rank 4 (hexadecapole …
Progress With Optically Pumped Sources Of Polarized Electrons, Mark A. Rosenberry, Herman Batelaan, J. P. Reyes, Timothy J. Gay
Progress With Optically Pumped Sources Of Polarized Electrons, Mark A. Rosenberry, Herman Batelaan, J. P. Reyes, Timothy J. Gay
Timothy J. Gay Publications
We report our work in developing new "turn-key" sources of polarized electrons. These sources operate by extracting the electrons from a discharge and polarizing them through optical pumping. Preliminary work demonstrates that beams of 4 μA with greater than 20% polarization are possible. Such devices could enormously simplify the running of many experiments in the fields of atomic structure, magnetic materials and biophysics.