Energy and angular distributions of excited rhodium atoms ejected from the rhodium (100) surface

Journal Article · Wed May 15 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.12078· OSTI ID:5793140

El-Maazawi, M; Maboudian, R; Postawa, Z; Winograd, N ^[1]

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1. Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802 (US)

Multiphoton resonance ionization spectroscopy has been used to determine the polar-angle and the kinetic-energy distribution of Rh atoms desorbed from the ion-bombarded Rh{l brace}100{r brace} surface in the fine-structure components of the {ital a}{sup 4}{ital F}{sub {ital J}} ground-state multiplet ({ital J}=9/2 and 7/2). The overall behavior is found to be very similar to that observed for higher-lying metastable levels. The energy distribution of the metastable level ({sup 4}{ital F}{sub 7/2} with excitation energy of {similar to}0.2 eV) is found to be broader than the ground-state ({sup 4}{ital F}{sub 9/2}) distribution. The energy distribution of the excited ejected atoms is shown to depend mainly on the electron configuration of the excited state. The measured spectra have also been used to investigate the dependence of the excitation probability on the emission velocity. It is shown that the excitation probability depends strongly on this parameter, approaching an exponential dependence on the reciprocal of the normal component of velocity at higher velocities ({gt}5{times}10{sup 5} cm/sec).

• OSTI ID: 5793140
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:14; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR DISTRIBUTION
ARGON IONS
CHARGED PARTICLES
COLLISIONS
DESORPTION
DISTRIBUTION
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY SPECTRA
EXCITED STATES
ION COLLISIONS
IONS
KEV RANGE
KEV RANGE 01-10
METALS
METASTABLE STATES
PLATINUM METALS
RHODIUM
SPECTRA
TRANSITION ELEMENTS