Photoionization measurements for the iron isonuclear sequence Fe{sup 3+}, Fe{sup 5+}, and Fe{sup 7+}

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.043412· OSTI ID:21544654

Gharaibeh, M F; Aguilar, A; Covington, A M; Emmons, E D; Scully, S W. J.; Phaneuf, R A ^[1]; Mueller, A ^[2]; Bozek, J D; Kilcoyne, A L. D.; Schlachter, A S ^[3]; Alvarez, I; Cisneros, C; Hinojosa, G ^[4]

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1. Department of Physics, University of Nevada, Reno, Nevada 89557-0220 (United States)
2. Institut fuer Atom- und Molekuelphysik, Universitaet Giessen, D-35392 Giessen (Germany)
3. Advanced Light Source, MS 7-100, Lawrence Berkeley National Laboratory Berkeley, California 94720 (United States)
4. Centro de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, Apartado Postal 6-96, Cuernavaca 62131 (Mexico)

Cross sections for single photoionization of Fe{sup 3+}, Fe{sup 5+}, and Fe{sup 7+} ions were measured at spectral resolutions of 0.04, 0.15, and 0.13 eV, respectively, by merging mass- and charge-selected ion beams with a beam of monochromatized synchrotron undulator radiation. The measurements span photon energy ranges beginning at the ionization thresholds and extending several tens of electron volts to include the most important resonant contributions due to 3p-nd transitions to autoionizing states. The photoion yield spectra are characterized by narrow resonances and also broad features in Fe{sup 3+} and Fe{sup 5+} that are believed to result from unresolved fast super-Coster-Kronig transitions following 3p-3d excitation. Absolute photoionization cross-section measurements were also performed using ion beams containing undetermined fractions of ions in their ground and metastable states. A Rydberg series attributed to 3p-nd transitions from the {sup 2}G{sub 1} metastable state in Fe{sup 3+} was identified. The data are compared with recently published measurements on Fe{sup 3+} and Fe{sup 5+} using a similar technique at lower spectral resolution.

• OSTI ID: 21544654
• Journal Information: Physical Review. A, Vol. 83, Issue 4; Other Information: DOI: 10.1103/PhysRevA.83.043412; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COSTER-KRONIG TRANSITIONS
CROSS SECTIONS
ELECTRONS
ENERGY RESOLUTION
EV RANGE
EXCITATION
ION BEAMS
IRON IONS
METASTABLE STATES
PHOTOIONIZATION
PHOTONS
PROTON SPECTRA
RESONANCE
RYDBERG STATES
SYNCHROTRONS
WIGGLER MAGNETS
YIELDS
ACCELERATORS
AUGER EFFECT
BEAMS
BOSONS
CHARGED PARTICLES
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EXCITED STATES
FERMIONS
IONIZATION
IONS
LEPTONS
MAGNETS
MASSLESS PARTICLES
RESOLUTION
SPECTRA