Electron transfer from H sub 2 and Ar to stored multiply charged argon ions produced by synchrotron radiation

Journal Article · Fri May 01 04:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.6379· OSTI ID:7261403

Kravis, S D; Church, D A ^[1]; Johnson, B M; Meron, M; Jones, K W ^[2]; Levin, J C; Sellin, I A ^[3]; Azuma, Y; Berrah-Mansour, N; Berry, H G ^[4]; Druetta, M ^[5]

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1. Physics Department, Texas A M University, College Station, Texas 77843 (United States)
2. Department of Applied Science, Brookhaven National Laboratory, Upton, New York 11973 (United States)
3. Physics Department, University of Tennessee, Knoxville, Tennessee 37996 (United States) Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
4. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
5. Laboratoire Traitement du Signal et Instrumentation, Universite de St. Etienne, St. Etienne (France)

The rate coefficients for electron transfer from Ar and H{sub 2} to Ar{sup {ital q}+} ions (3{le}{ital q}{le}6) have been measured using an ion-storage technique in a Penning ion trap. The ions were produced in the trap by {ital K}-shell photoionization of Ar atoms, using broadband synchrotron x-ray radiation. {ital K}-electron removal resulted in vacancy cascading, yielding a distribution of argon-ion charge states peaked near Ar{sup 4+}. The stored ion gas had an initial temperature near 480 K. The basic data determining the rate coefficients {ital k}(Ar{sup {ital q}+}) are the storage time constants of each charge state in the trap, in the presence of a measured pressure of target gas. The results of the measurements (in units of 10{sup {minus}9} cm{sup 3} s{sup {minus}1}) are {ital k}(Ar{sup 3+},H{sub 2})=4.3(0.7), {ital k}(Ar{sup 3+},Ar)=1.6(0.2), {ital k}(Ar{sup 4+},H{sub 2})=5.2(0.6), {ital k}(Ar{sup 4+},Ar)=2.5(0.3), {ital k}(Ar{sup 5+},H{sub 2})=5.9(0.7), {ital k}(Ar{sup 5+},Ar)=2.9(0.3), {ital k}(Ar{sup 6+},H{sub 2})=8.5(1.2), and {ital k}(Ar{sup 6+},Ar)=2.5(0.3).

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: AC02-76CH00016; W-31109-ENG-38
• OSTI ID: 7261403
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:9; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ARGON IONS
ATOM COLLISIONS
BREMSSTRAHLUNG
CATIONS
CHARGE STATES
CHARGED PARTICLES
COLLISIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRON TRANSFER
ELECTRONIC STRUCTURE
ELEMENTS
FLUIDS
GASES
HYDROGEN
INNER-SHELL IONIZATION
ION COLLISIONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONIZATION
IONIZING RADIATIONS
IONS
K SHELL
MOLECULE COLLISIONS
MULTICHARGED IONS
NONMETALS
PHOTOIONIZATION
RADIATIONS
RARE GASES
SYNCHROTRON RADIATION
TRAPPING
X RADIATION