STORAGE RING CROSS SECTION MEASUREMENTS FOR ELECTRON IMPACT IONIZATION OF Fe{sup 12+} FORMING Fe{sup 13+} AND Fe{sup 14+}

Journal Article · Sun Jul 10 00:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/735/2/105· OSTI ID:21578394

Hahn, M; Novotny, O; Savin, D W ^[1]; Grieser, M; Krantz, C; Repnow, R; Wolf, A ^[2]; Lestinsky, M ^[3]; Mueller, A; Schippers, S ^[4]

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1. Columbia Astrophysics Laboratory, Columbia University, 550 West 120th, New York, NY 10027 (United States)
2. Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)
3. GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstr. 1, 64291 Darmstadt (Germany)
4. Institut fuer Atom- und Molekuelphysik, Justus-Liebig-Universitaet Giessen, Leihgesterner Weg 217, 35392 Giessen (Germany)

We report electron impact ionization cross section measurements for electron impact single ionization of Fe{sup 12+} forming Fe{sup 13+} and electron impact double ionization of Fe{sup 12+} forming Fe{sup 14+}. These are the first electron impact ionization data for any Si-like ion uncontaminated by an unknown metastable fraction. Recent distorted wave calculations agree with our single ionization results to within {approx}15%. Double ionization is dominated by inner shell ionization of a 2l electron resulting in autoionization of a second electron as the inner shell hole is filled.

• OSTI ID: 21578394
• Journal Information: Astrophysical Journal, Vol. 735, Issue 2; Other Information: DOI: 10.1088/0004-637X/735/2/105; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRONS
INNER-SHELL IONIZATION
STORAGE RINGS
ELEMENTARY PARTICLES
FERMIONS
IONIZATION
LEPTONS