High-resolution measurement of the dielectronic recombination of fluorinelike selenium ions

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.53.1413· OSTI ID:282019

Lampert, A; Wolf, A; Habs, D; Kenntner, J; Kilgus, G; Schwalm, D ^[1]; Pindzola, M S; Badnell, N R ^[2]

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1. Max-Planck-Institut fuer Kernphysik, 69117 Heidelberg, Germany and Physikalisches Institut der Universitaet Heidelberg, 69120 Heidelberg (Germany)
2. Department of Physics, Auburn University, Auburn, Alabama 36849-5311 (United States)

We have measured the dielectronic recombination cross section of Se{sup 25+} ions at center-of-mass energies from 1 to 1800 eV using merged electron and ion beams in the Heidelberg heavy-ion Test Storage Ring (TSR). All dielectronic resonances involving changes of {Delta}{ital N}=0 and {Delta}{ital N}=1 of the core principal quantum number {ital N} are covered with high-energy resolution (ranging from {lt}0.6 eV at {lt}90 eV to {approx_equal}6 eV at 1600 eV). A strong contribution of {Delta}{ital N}=1 Rydberg resonances at 1200{endash}1700 eV is observed. The results are compared with isolated-resonance intermediate-coupling calculations of the cross section. Good agreement is found for the {Delta}{ital N}=0 and the low-lying {Delta}{ital N}=1 resonances. For the {Delta}{ital N}=1 Rydberg series the resonant pattern continues to be well reproduced by theory, whereas the total energy-integrated cross section significantly exceeds the theoretical prediction. From experimental and theoretical results rate coefficients for isotropic plasma temperatures between 100 and 2000 eV are also derived. {copyright} {ital 1996 The American Physical Society.}

• DOE Contract Number: FG05-86ER53217
• OSTI ID: 282019
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CROSS SECTIONS
ELECTRON BEAMS
ELECTRON-ION COLLISIONS
EV RANGE
ION BEAMS
ION-ION COLLISIONS
KEV RANGE 01-10
MULTICHARGED IONS
RECOMBINATION
RYDBERG STATES
SELENIUM IONS
STORAGE RINGS