Cross sections for resonant transfer and excitation in Fe sup q + +H sub 2 collisions

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

DOI:https://doi.org/10.1103/PhysRevA.45.7846· OSTI ID:7286227

Clark, M W; Tanis, J A; Bernstein, E M ^[1]; Badnell, N R ^[2]; DuBois, R D ^[3]; Graham, W G ^[4]; Morgan, T J ^[5]; Plano, V L ^[6]; Schlachter, A S ^[7]; Stockli, M P ^[8]

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1. Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008 (United States)
2. Department of Physics, Auburn University, Auburn, Alabama 36849 (United States)
3. Pacific Northwest Laboratory, Richland, Washington 99352 (United States)
4. Department of Pure and Applied Physics, Queen's University Belfast, Belfast BT7 1NN (United Kingdom)
5. Physics Department, Wesleyan University, Middletown, Connecticut 06457 (United States)
6. Physics Department, Kalamazoo College, Kalamazoo, Michigan 49007 (United States)
7. Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
8. Department of Physics, Kansas State University, Manhattan, Kansas 66506 (United States)

Resonant transfer and excitation (RTE) is investigated for Fe{sup {ital q}+} ions ({ital q}=23, 24, and 25) colliding with H{sub 2}. For each charge state, cross sections for RTE were obtained from measurements of {ital K} x rays, emitted from the doubly excited intermediate state, coincident with single-electron capture by the incident ion. Additionally, for Fe{sup 25+} cross sections were obtained from measurements of coincidences between the two {ital K} x rays emitted from the intermediate state. These latter measurements provide information on the lifetimes of intermediate metastable states formed in the RTE process. In all cases, measured cross sections are in good agreement with calculations based on theoretical cross sections for dielectronic recombination (DR). Since RTE closely approximates DR, the results indicate that dielectronic-recombination cross sections involving {ital K}-shell excitation can be accurately predicted for highly charged iron ions. The results for Fe{sup 25+} show that metastable states are sufficiently short lived to be observable in the RTE (or DR) process for these hydrogenlike ions.

• OSTI ID: 7286227
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:11; 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
ABSORPTION
CHARGE STATES
CHARGED PARTICLES
COINCIDENCE METHODS
COLLISIONS
COUNTING TECHNIQUES
CROSS SECTIONS
DECAY
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
HYDROGEN
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONIZING RADIATIONS
IONS
IRON IONS
MOLECULE COLLISIONS
MULTICHARGED IONS
NONMETALS
PARTICLE DECAY
RADIATIONS
RADIATIVE DECAY
RESONANCE ABSORPTION
SORPTION
X RADIATION