Mass Spectrometric Investigation of Surface Ionization. VI. Desorption of Th+, Np+, and Pu+ from Tungsten Surfaces

1 January 1971

journal article
research article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 54 (1) , 170-174
https://doi.org/10.1063/1.1674588

Abstract

The mean residence times of Th⁺, Np⁺, and Pu⁺ on polycrystalline tungsten surfaces have been determined as functions of temperature using the modulated beam technique. The desorption parameters, determined from the relationship

{1 / τ = ω}_{0} \exp {(− E}_{i} / kT)

, are

\begin{matrix} Ion & ω_{0} (\sec^{−1}) & E_{i} (eV) \\ {Th}^{+} & {(1.7 ± 1.5) × 10}^{14} & 7.83 ± 0.25 \\ {Np}^{+} & {(6.8 ± 3.8) × 10}^{13} & 6.32 ± 0.12 \\ {Pu}^{+} & {(1.6 ± 0.9) × 10}^{12} & 4.99 ± 0.15. \end{matrix}

Keywords

MEAN RESIDENCE TIME

This publication has 20 references indexed in Scilit:

Surface Ionization. V. Desorption of U Neutrals from W Surfaces
The Journal of Chemical Physics, 1970
Surface Ionization. III. The First Ionization Potentials of the Lanthanides
The Journal of Chemical Physics, 1968
Surface Ionization. II. The First Ionization Potential of Uranium
The Journal of Chemical Physics, 1967
Surface Ionization. I. Desorption of U+ Ions from W and Re Surfaces
The Journal of Chemical Physics, 1967
Transient species produced by the catalytic decomposition of acetone in a mass spectrometer
Journal of Catalysis, 1966
Kinetics of Desorption. III. Rb+, K+, and Na+ on Rhenium
The Journal of Chemical Physics, 1963
A pulsed-molecular-beam mass spectrometer for studies of atomic and ionic impact phenomena on metal surfaces
Advanced Energy Conversion, 1963
Kinetics of Desorption. II. Cs+ and Ba+ from Rhenium
The Journal of Chemical Physics, 1963
Kinetics of Cs+ Desorption from Tungsten
The Journal of Chemical Physics, 1962
Über die elektrische Oberflächenschicht der Metalle
The European Physical Journal A, 1928