Simple method for Calculating Electron Affinity: Results for Ca, Sr and Ce

POSTER

Abstract

We have benchmarked the recently developed Regge-pole methodology for electron- atom elastic scattering on the most recent measurement of the electron affinity (EA) of the Ca atom [1]. The predictive power of the methodology is then demonstrated by calculating the binding energy of the ground state of the very complicated Ce$^-$ ion, with a g-orbital attachment, a shape resonance at 0.37 eV and a Ramsauer-Townsend minimum at about 0.09~eV [2]. Our calculated EA for Ce agrees very well with the latest measured value [3], but disagrees with that of Ref. [4]. Low-energy electron scattering partial, total and differential cross sections for e$^-$-Ca, e$^-$-Sr and e$^-$-Ce will be presented and discussed.\\ $[1]$ V. V. Petrunin, H. H. Andersen, P. Balling and T. Andersen, Phys. Rev. Lett. {\bf 76}, 744 (1996)\\ $[2]$ Z. Felfli, A. Z. Msezane and D. Sokolovski, J. Phys. B {\bf 41}, Fast Track,At Press (2008)\\ $[3]$ C. W. Walter {\it et al}, Phys. Rev. A {\bf 76}, 052702 (2007)\\ $[4]$ V. T. Davis and J. S. Thompson, Phys. Rev. Lett. {\bf 88}, 073003 (2002)

Authors

  • Z. Felfli

    Clark Atlanta University

  • Alfred Z. Msezane

    Clark Atlanta University

  • Dan Larson

    RSPhySE, ANU and Flinders University, RSPhysSE, Australian National University, Drake University, Yale University, Physics Department, Goucher College, Baltimore MD 21204, Department of Physics, University of Wisconsin, Department of Physics, Harvard University; Harvard-MIT Center for Ultracold Atoms, Division of Engineering and Applied Sciences, Harvard University; Harvard-MIT Center for Ultracold Atoms, Seoul National University, Aarhus University, JILA and Dept. of Physics, University of Colorado at Boulder, UC Berkeley, Department of Physics, Temple University, JILA and University of Colorado, Lab Aime Cotton, The University of Oklahoma, Laser Cooling and Trapping Group, NIST, Gaithersburg, SRI International, FOCUS Center and MCTP, Department of Physics, University of Michigan, NIST, IOIP, Rose-Hulman Institute of Technology, Los Alamos National Laboratory, Theoretical Division, Cal Poly State University, San Luis Obispo, NIST-Boulder, Princeton University, Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, Department of Theoretical Physics, Institute of Chemical Physics, University of Latvia, Riga, Latvia, Queen's University Belfast, UK, University of Wales, Swansea, UK, University of Wisconsin Stevens Point, Laboratoire Aime Cotton, CNRS, Universite Paris-Sud, 91405 Orsay, France, CNISM, Physics Department, Pisa University, 56127 Pisa, Italy, The Pennsylvania State University, University Park, PA 16802, FOCUS Center, Physics Department, University of Michigan, Ann Arbor, MI, 49109, National Institute of Standards and Technology, 325 S. Broadway St, Boulder, CO 80305, Harvard University, College of William \& Mary, Harvard-MIT Center for Ultracold Atoms, Department of Physics, Harvard University, University of Connecticut, ITAMP, ITAMP, University of Connecticut, Institute for Quantum Information Sciences, University of Calgary, University of Nevada at Reno, Weizmann Institute of Science, Max Planck Institute for Nuclear Physics, Oak Ridge National Lab, Columbia Astrophysics Laboratory, MPI f. Kernphysik Heidelberg, TU Clausthal, MPI f. komplexe Systeme Dresden, Bangabasi Morning College, 19 R.C. Sarani, Kolkata 700 009, India, Department of Physics, University of Trento, I-38050 Povo, Italy, Lawrence Berkeley National Laboratory and University of California, Berkeley CA, USA, Lawrence Berkeley National Laboratory, Berkeley CA, USA, Imperial College, Max Planck Institute for the Physics of Complex Systems, American University of Sharjah, UAE, INRS, Quebec, NRC, Ottawa, Canada, Kansas State University, Institute of Optics and Quantum Electronics, Jena, Germany, Dept. of Applied Physics and Chemistry, The University of Electro-communications, Tokyo Japan, Institut f\"ur Kernphysik, University Frankfurt, Frankfurt Germany, J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS 66506, University of Nebraska - Lincoln, University of Nebraska--Lincoln, Institute for Theoretical Physics, Vienna University of Technology, Austria, EU, J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Los Alamos National Laboratory, National Tsing Hua University, University of Pittsburgh, Technische Universitat Berlin, Germany, University of Wisconsin-Madison, University of Wisconsin, National Institute of Standards and Technology, Physics Department, Goucher College, Baltimore, MD 21204, Oxford University, Florida State University, Los-Alamos National Laboratory, University of Windsor, GANIL, Argonne National Laboratory, Laboratoire Kastler Brossel - CNRS, JILA, NIST and the University of Colorado Department of Physics, Department of Physics, Colorado School of Mines, University of Innsbruck, University of Maryland, Columbia University, University of Virginia, ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts, Rice University, University of Oklahoma, Universidade de S\~{a}o Paulo, University of Wisconsin - Madison, University of British Columbia, Department of Physics and Astronomy and Rice Quantum Institute, Rice University, Houston TX 77005, University of Michigan, Medical College of Wisconsin, Department of Physics and Astronomy and Rice Quantum Institute, Rice University, Houston, TX 77005, JQI: NIST and U. of Maryland, Colorado State University, Augustana College, JRML, Kansas State University, Auburn University, Department of Physics and JILA, University of Colorado at Boulder, Lawrence Berkeley National Laboratory, Charles University in Prague, University of California, Davis, University of Rochester, University of Colorado, University of Toronto, School of Physics, Georgia Institute of Technology, Atlanta, GA, Physics Department, Oklahoma State University, Stillwater, OK, Institut fur Physik der Humboldt-Universitat zu Berlin, JST, ERATO and Tokyo Institute of Technology, Department of Physics, Georgia Southern University, JILA and Department of Physics, University of Colorado, JILA, NIST, and Department of Physics, University of Colorado, Colby College, Department of Physics and The James Franck Institute, The University of Chicago, Department of Physics (FCFM), Universidad de Chile, Texas A\&M, Bates College, Norman Bridge Laboratory of Physics, California Institute of Technology, B2 Institute, Department of Physics and College of Optical Sciences, The University of Arizona, Tucson, AZ 85721, USA, Dept. of Physics, College of William and Mary, Department of Physics and Computational Science Research Center, San Diego State University, San Diego CA, Minerva Center and Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel, Oklahoma State University, The Queen's University of Belfast, UK, School of Maths and Physics, Queen's University Belfast, UK, STFC Daresbury, Warrington, UK, Queens University Belfast, UK, Los Alamos National Lab, Penn State University, Virginia Commonwealth University, Ioffe Physical-Technical Institute, St. Petersburg, Russia, Arifov's Institute of Electronics, Tashkent, Uzbekistan, Ioffe Physical-Technical Institute, St.-Petersburg, Russia, Arifov Institute of Electronics, Tashkent, Uzbekistan, Lawrence Berkeley Laboratory, UC Berkeley, Loras College, LBNL, University of Nebraska-Lincoln, University of Newcastle-Ourimbah, SLAC, Taylor Univ., Upland, Indiana, Univ. of Idaho, Moscow, Synchrotron Radiation Center, Univ. of Wisconsin--Madison, Dept. of Chemistry - Texas A\&M University, Dept. of Physics - Denison University, Advanced Light Source - Lawrence Berkeley National Lab., Physics Dept. - Western Michigan University, Laboratoire de Chimie Physique Matiere et Rayonnement, University of Nevada, Las Vegas, University of Pittsburgh, Pittsburgh, PA 15260, USA, Bose Institute, Kolkata 700009, India, University of Bucharest, Bucharest, Romania, IPFW, Physics Department, Michigan Technological University, University of Oxford, Hefei National Lab, Univ of Sci \& Tech of China, Dept of Earth \& Environ Sci, Univ of Illinois at Chicago, EFI \& Dept of Geophys. Sci., UofC, Chem Div, ANL, Phys Div, ANL, Phys Div, Argonne National Lab \& EFI, UofC, Naval Research Laboratory, Washington State University, University of Melbourne, Augustana College, Sioux Falls, JILA, NIST and the University of Colorado, Boulder, NIST Gaithersberg, JILA, Kyoto University, University of Arizona, JILA and Department of Physics, University of Colorado and NIST, Boulder, CO 80309, USA, National Research Council Canada, INRS-Energie, Materiaux et Telecommunications, University of Electro-Communications, Tokyo, Japan, JILA and Department of Physics, CU Boulder, INFM and Classe di Scienze, Scuola Normale Superiore of Pisa, Pisa, Italy, Deparment of Physics and Astronomy, York University, Toronto ON, Canada M3J 1P3, York University, ETH Zurich, University of Cambridge, Laboratoire Kastler Brossel Paris, University of New Mexico, Duke University, ITAMP, Harvard University, LIXAM, CNRS-Universit\'e Paris Sud, CNR-IMIP (Rome), Max-Planck-Institut fur Kernphysik, University of North Alabama, Florence, AL, CIRIL-Ganil, Caen, France, Inst. f. Kernphysik Univ. Frankfurt, GSI-Darmstadt, Max Planck Inst. f. Kernphysik Heidelberg, Mathem. Inst. LMU-M\"unchen, Physikal. Inst. Heidelberg, GSI- Darmstadt, Physik. Inst. Univ Heidelberg, GSI-Darmstadt, Max PLanck Inst-Heidelberg, Eindhoven Technical University, Penn State, Department of Physics, University of Georgia, Oak Ridge National Laboratory, Penn State University at Berks, Harvard University Physics Department, University of British Columbia Department of Chemistry, University of British Columbia/Moscow State University Departments of Chemistry, Ohio State University, Institut fuer Experimentalphysik; Institut fuer Quantenoptik und Quanteninformation, Oesterreichische Akademie der Wissenschaften, Innsbruck, Austria, JILA, National Institute of Standards and Technology and the University of Colorado, Department of Physics, University of Colorado, Boulder, CO, 80309, Indiana University, Max-Planck-Institute for Quantum Optics, Hans-Kopfermann-Str. 1, 85748 Garching, Germany, University of Illinois, NIST Gaithersburg, Department of Physics, University of Toronto, ARC Centre of Excellence for Quantum-Atom Optics and Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Australia, Max-Planck-Institute for Quantum Optics, Graduate School of Frontier Sciences, The University of Tokyo, Vienna University of Technology, Physics Division, Oak Ridge National Laboratory, University of Portland, Jet Propulsion Laboratory, Department of Physics, University of Windsor, University of Manchester, ITAMP, Harvard--Smithsonian Center for Astrophysics, Penn State, UNLV, ORNL, UGA, Wesleyan University, University of Western Australia, Univerisity of Windsor, Manipal Institute of Technology, IIT-Madras, Dept. of Physics and Astronomy, Univ. of Wisconsin--Eau Claire, Institute of Physics, Belgrade, Serbia, Georgia State University, Theoretical Division, Los Alamos National Laboratory, New Mexico, USA, Physics Division, National Science Foundation, Virgina, USA, USC, Nat. Central U., Taiwan, Gothenburg University, Sweden, Denison University, Department of Physics, University of Pedagogy, Vietnam, SUNY Fredonia, Lehigh University, Tsinghua U., Beijing, China, Lab. Aim\'{e} Cotton, CNRS, U. Paris-Sud, Orsay, France, SUNY Stony Brook, Lab. Aime Cotton, U. Paris-Sud, Orsay, France, U. Hannover, Germany, Temple U., U. Lyon 1, France, Department of Physics and Astronomy, York University, University of Nevada, Pennsylvania State University, Lundbeck Foundation Theoretical Center for Quantum Systems Research, University of Aarhus, Denmark, TRIUMF, Fritz-Haber-Insitut der Max-Planck Gesellschaft, Berlin, Germany, University of Frankfurt, Technion - Israel Institute of Technology, Christian-Albrechts-Universit\"at zu Kiel, Univ. of Kaiserslautern, Germany, JILA, University of Colorado, University of Nebraska Lincoln, Rice University, Department of Physics and Astronomy, Houston, TX 77005, The University of Michigan, Institute of Physics, Warsaw, Poland, Edward L. Ginzton Laboratory, Stanford University, Stanford, CA 94305, USA, CQT/Physics Dept, Nat. Univ. Singapore, IMRE / ASTAR, University of Nevada, Reno, Dean of the Eberly College of Science, The Pennsylvania State University