Photon-stimulated desorption of solid neopentane

Journal Article · Mon Oct 15 04:00:00 EDT 1984 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.30.4748· OSTI ID:6358055

Kelber, J A; Daniels, R R; Turowski, M; Margaritondo, G; Tolk, N H; Kraus, J S

The positive-ion yields and kinetic-energy distributions resulting from the photon bombardment of solid neopentane ((CH/sub 3/)/sub 4/C) have been measured for photon excitation energies between 17 and 45 eV. The ion (>94% H/sup +/) appearance potential is at 20 ( +- 1) eV with a yield maximum at 24 ( +- 1) eV of 2 x 10/sup -7/ ions/photon. For all photon energies, the ion-kinetic-energy distribution peaks at 1.9 ( +- 0.25) eV and is broadened asymmetrically to higher kinetic energies. These results indicate that the process responsible for H/sup +/ desorption near threshold is a C 2s..-->..Rydberg-type level excitation followed by decay to a final state involving several valence holes and at least one electron in a Rydberg-type level.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6358055
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 30:8; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

2-2-DIMETHYLPROPANE
36 MATERIALS SCIENCE
360404* -- Materials-- Polymers & Plastics-- Physical Properties-- (-1987)
ALKANES
CATIONS
CHARGED PARTICLES
CONDENSATES
DESORPTION
EMISSION
ENERGY LEVELS
ENERGY SPECTRA
EXCITED STATES
FLUIDS
GAS CONDENSATES
HOLES
HYDROCARBONS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
IONS
LIQUIDS
NATURAL GAS LIQUIDS
ORGANIC COMPOUNDS
PHOTOEMISSION
RYDBERG STATES
SECONDARY EMISSION
SOLIDS
SORPTIVE PROPERTIES
SPECTRA
SURFACE PROPERTIES