Faculty - Gay

Timothy Gay, Professor

Timothy Gay

Timothy Gay

Physics & Astronomy
University of Nebraska - Lincoln
073 Jorgensen Hall
Lincoln, Nebraska 68588-0299
Office: 402-472-2773

Research Interests

We are interested in polarized electron physics. Our work involves studies of polarized electrons scattering from atomic and chiral molecular targets, the development of novel sources of polarized electrons and electron polarimeters, and investigations of the fundamental nature of the electron. We are funded by the Physics Division of the National Science Foundation.


  • New technique for the reduction of helicity-correlated instrumental asymmetries in photoemitted beams of spin-polarized electrons, J.M. Dreiling, S.J. Burtwistle, and T.J. Gay, Applied Optics 54, 4, 763-769. DOI: 10.1364/AO.54.000763. (2015). [PDF]
  • Chirally Sensitive Electron-Induced Molecular Breakup and the Vester-Ulbricht Hypothesis, J.M. Dreiling and T.J. Gay, Physical Review Letters 113, 118103 (2014). [PDF]
  • Measurement of electron beam polarization from unstrained GaAs via two-photon photoemission, J.L. McCarter, A. Afanasev, T.J. Gay, J. Hansknecht, A. Kechiantz, and M. Poelker, Nuclear Instruments and Methods in Physics Research A 738, 149–153 (2014). [PDF]
  • Threshold Alignment Reversal and Circularly Polarized Fluorescence in Rotationally Resolved H2, J.W. Maseberg, K. Bartschat, and T.J. Gay, Physical Review Letters 111, 253201. DOI: 10.1103/PhysRevLett.111.253201. (2013) [PDF]
  • Transverse measurements of polarization in optically pumped Rb vapor cells, J.M. Dreiling, E.B. Norrgard, D.Tupa, and T.J. Gay, Physical Review A 86, 053416. DOI: 10.1103/PhysRevA.86.053416 (2012). [PDF]
  • Orientation of doubly excited states in N2, J.E. Furst, T.J. Gay, J. Machacek, D. Kilkoyne, and K.W. McLaughlin, Physical Review A 86, 041401(R). DOI: 10.1103/PhysRevA.86.041401 (2012). [PDF]
  • Measurement of Electron Beam Polarization from Unstrained Bulk GaAs via Two Photon Photoemission, J.L. McCarter, T.J. Gay, J. Hansknecht, M. Poelker, and M.L. Stutzman, J.Phys.B 44, 045201 (2011). [PDF]
  • Production of excited atomic hydrogen and deuterium from H2, HD and D2 photodissociation, J.R. Machacek, V.M. Andrianarijaona, J.E. Furst, A.L.D. Kilcoyne, A.L. Landers, E.T. Litaker, K.W. McLaughlin, and T.J. Gay, J.Phys.B 44, 045201 (2011). [PDF]
  • Detecting an Extended LightSource Through a Lens, E.T. Litaker, J.R. Machacek, and T.J. Gay, J. Phys. 32, 1107 (2011). [PDF]
  • Electron Spin Reversal Phenomenon in Optically-Pumped Rb, E.B. Norrgard, D. Tupa, J.M. Dreiling, T.J. Gay, Phys. Rev. A 82, 033408 (2010). [PDF]
  • A low-voltage retarding-field Mott polarimeter for photocathode characterization, J.L. McCarter, M.L. Stutzman, K.W. Trantham, T.G. Anderson, A.M. Cook, T.J. Gay, NIMA Phys. Research A 618, Pages 30-36 (2010). [PDF]
  • Alignment and Orientation of Diatomic Molecules Induced by Polarized Electron Impact, J.W. Maseberg, T.J. Gay, J. Phys. Conf. Ser. 212, 012021 (2010). [PDF]
  • Physics and Technology of Polarized Electron Scattering from Atoms and Molecules, T.J. Gay, Advances in Atomic, Molecular and Optical Physics 57, Chapter 4 (2009). [PDF]
  • Spin torque on molecular rotation induced by polarized electrons, J.W. Maseberg, T.J. Gay, Phys. Rev. A 79, 022705 (2009). [PDF]
  • Use of Partial-Wave Decomposition to Identify Resonant Interference Effects in the Photoionization-Excitation of Argon, T.J. Gay, C.H. Greene, J.R. Machacek, K.W. McLaughlin, H.W. van der Hart, O. Yenen, D.H. Jaecks, J. Phys. B 42, 044008 (2009). [PDF]