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

Journal Article · Fri May 01 00:00:00 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 Lab. (ANL), Argonne, IL (United States)
• DOE Contract Number: AC02-76CH00016; W-31-109-ENG-38
• OSTI ID: 7261403
• Journal Information: Physical Review A. General Physics; (United States), Vol. 45:9; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

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