Ionization and Charge Transfer in Collisions of Singly and Doubly Charged Heavy Ions with Gaseous Targets

POSTER

Abstract

While energetic atomic collisions can be well described for few electron systems, collisions involving many electrons are more difficult to model. Understanding these collision systems is essential to modeling energy deposition in the irradiation of materials. Experimental measurements of absolute total and partial cross sections for charge transfer and ionization have been made for collisions of $C^{+}$,$Cl^{+}$, and $Cl^{2+}$ in the energy range of 1-4 MeV with various gaseous targets including Ar, Ne, $N_{2}$, $H_{2}O$, and $CH_{4}$. The measurements were taken at the tandem Van de Graaff accelerator facility at East Carolina University. Post-collision projectile ions were electrostatically analyzed, and total cross sections are determined by measuring the final charge fraction of the projectile beam as a function of target density. Recoil target ions were electrostatically extracted, and their final charge was determined using time of flight methods. The final charge of the projectiles were then measured in coincidence with the recoil ion charge to determine partial cross sections.

Authors

  • Nicholas Evans

  • Larry Toburen

  • Jefferson Shinpaugh

    East Carolina University

  • R.F. Kelly

    SVT Associates, Department of Material Science and Engineering, Department of Chemistry, University of Florida, Florida International University, WebAssign, North Carolina State University, Broughton High School, Dept.~of Chemistry, Univ.~of Florida, Dept.~of Physics, Univ.~of Florida, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32306, USA, Center for Superconductivity Research, Dept. of Physics, University of Maryland, College Park, MD, 20742, USA, Dept. of Physics, University of Florida, 32611, USA, Experimentalphysik VI, Center for Electronic Correlations and Magnetism, Institute of Physics, Augsburg, Germany, Physics \& Astronomy, UNC-CH, Chapel Hill, NC, University of North Carolina, Auburn University, University of Virginia, Tech. Univ. Eindhoven, University of Florida, Los Alamos National Labs, University of New Mexico, Advanced Materials Research Institute, University of New Orleans, New Orleans, LA, Department of Physics, University of Florida, UF, NHMFL, FSU / NHMFL, FSU, University of Arkansas, Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA, Dept. of Physics, University of Florida, Gainesville, FL 32611-8440, USA, Dept. Chemistry Florida State Univeristy, University of Brewen, Tohoku University, Okayama University, Dept of Chemistry, Florida State University, Dept. of Chemistry, Florida State University, National High Magnetic Field Laboratory, Tallahassee, FL, Laboratoire Lois Neel, Grenoble, France, Dept. of Chemistry, Texas A\&M University, Tsinghua Univ., INEL, JINR, Vanderbilt Univ./LBNL, Vanderbilt Univ., SVT Associates, Inc., Department of Chemical Engineering, University of Florida, Department of Materials Science and Engineering, University of Florida, Department of Electrical Engineering, National Central University, Taiwan, University of Miami, North Carolina Central University, University of Missouri Rolla, AB Millimetre, France, Thomas Keating Ltd., UK, Dept. of Physics, Univ. of Florida, Department of Material Science and Engineering University of Florida, Department of Chemistry University of Florida, Department of Chemical Eng. University of Florida, Naval Research Lab, Washington, DC, University of Rajshahi, LENIN All Russian Electrotechnical Institute, Moscow, Russia, Independent Researcher, Argentina