Accession Number:

ADA067589

Title:

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.

Descriptive Note:

Technical rept.,

Corporate Author:

NEW YORK UNIV N Y DEPT OF CHEMISTRY

Personal Author(s):

• Watanabe,Iwao
• Flanagan,James B.

Report Date:

1979-03-30

Pagination or Media Count:

40.0

Abstract:

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

Descriptors:

• *PHOTOELECTRIC EMISSION
• *COMPUTER APPLICATIONS
• *ULTRAVIOLET SPECTROMETERS
• LIQUIDS
• COMPUTER PROGRAMMING
• LIGHT PULSES
• DATA REDUCTION
• DATA ACQUISITION
• QUANTUM EFFICIENCY
• SURFACE CHEMISTRY
• FLOW CHARTING
• ONLINE SYSTEMS
• BANDPASS FILTERS
• CIRCUIT ANALYSIS
• MINICOMPUTERS
• FAR ULTRAVIOLET RADIATION

Subject Categories:

• Physical Chemistry
• Computer Programming and Software
• Computer Hardware
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE