Department of Physics, University of Richmond, Richmond, Virginia, USA. olipan@richmond.edu|Department of Physics, University of Richmond, Richmond, Virginia, USA. olipan@richmond.edu|Department of Physics, University of Richmond, Richmond, Virginia, USA. olipan@richmond.edu|Department of Physics, University of Richmond, Richmond, Virginia, USA. olipan@richmond.edu|Department of Physics, University of Richmond, Richmond, Virginia, USA. olipan@richmond.edu