Photoelectron spectrometry of manganese vapor between 12 and 110 eV
The important dynamic parameters, partial photoionization cross section sigma and angular distribution parameter ..beta.., have been determined for atomic Mn between 12 and 110 eV by electron spectroscopy with synchrotron radiation (ESSR). The single-electron photolines from the 3d and 4s subshells and the associated two-electron satellite lines were measured, and the resonance region of 3p..-->..3d excitation around 50 eV was studied in detail. Absolute partial cross sections were derived. For the 3d-subshell properties, we find good agreement with the many-body perturbation-theory calculation (MBPT) by Garvin et al. over the entire energy range and with the random-phase-approximation results by Amusia et al. over the 3p resonance region. Available calculation (MBPT) underestimates the enhancement of sigma(4s) through the 3p resonance. Where overlap exists, the experimental data by Bruhn et al. and by Kobrin et al. agree well with our results. The work on Mn, taken in toto, provides a good overall understanding of the photoionization dynamics of the 3d transition series element Mn, which has a half-filled subshell, although a number of problems, e.g., two- and three-electron transitions and the low-energy region, remain to be further studied. A need for an accurate determination (5--10%) of the total photoabsorption cross section is indicated.
- Research Organization:
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
- OSTI ID:
- 6434588
- Journal Information:
- Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 30:3; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
BREMSSTRAHLUNG
CROSS SECTIONS
DATA
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
IONIZATION
MANGANESE
METALS
NUMERICAL DATA
PERTURBATION THEORY
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RADIATIONS
RANDOM PHASE APPROXIMATION
SPECTROSCOPY
SYNCHROTRON RADIATION
TRANSITION ELEMENTS
VAPORS