An Apparatus for the Measurement of Photoelectron Emissoin Current with On-Line Computer Data Acquisition. Part I. Description of Cell and Operational Procedures. Part II. Electronics, Computer Interfacing and Programming.

摘要

Described is a new apparatus which enables us to obtain quantum yield data for liquids or solutions of up to about 5-torr vapor pressure, e.g., aqueous solutions, using photon energies up to 10.5 eV. Data are taken by on-line minicomputer and are stored on floppy disk for later analysis. Features of the apparatus include: efficient temperature control; continuous renewal of liquid surface; very short path of light through vapor to minimize photon absorption or gas phase electron emission; use of light chopping and bandpass filtering to enhance sensitivity. (Author)