Secondary Ion Mass Spectrometry Studies of Solids and Surfaces.
Abstract
We have recently completed construction of an energy- and angle-resolved detector for neutral particles desorbed from ion bombarded surfaces. It is based on a time-of-flight measurement for the neutral energies, multiphoton resonance ionization (MPRI) for the angular information. Using this detector, we have initiated a series of experiments aimed at determining the energy and angular distributions of the Rh atoms ejected from clean and adsorbate covered polycrystalline and single crystal surfaces. From the polycrystalline material, we find the velocity distribution of Rh atoms follows closely the form predicted by Thompson with a peak intensity occuring at approximately 5 eV and a high energy tail decreasing in intensity as E-2. Polar angle distributions exhibit nearly a cos2 shape. From a Rh(001) crystal, the velocity distribution generally peaks at higher value than that found from the polycrystalline surface, and depends strongly on the value of the polar collection angle. In addition to energy distribution measurements into a given angle, we are able to extract angular distribution measurements into a given azimuth from Rh(001) show three peaks of preferred ejection angles. Originator supplied keywords include: Surface Analysis, Secondary Ion Mass Spectrometry, Ion Bombardment, Multi-Photon, Clusters.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 17, 1985
- Accession Number
- ADA151744
Entities
People
- N. Winograd
Organizations
- Pennsylvania State University