Accession Number:

ADA048315

Title:

Photon Interactions with Atmospheric Negative Ions.

Descriptive Note:

Final rept. 1 Apr 76-30 Sep 77,

Corporate Author:

SRI INTERNATIONAL MENLO PARK CA MOLECULAR PHYSICS CENTER

Personal Author(s):

• Moseley,J. T.
• Cosby,P. C.
• Peterson,J. R.

Report Date:

1977-11-30

Pagination or Media Count:

80.0

Abstract:

Photodestruction cross sections have been measured for seventeen negative ions of atmospheric importance over the wavelength range from 5000 to 8400 A using a drift tube mass spectrometer coupled with a tunable dye laser. The cross sections vary from zero to nearly 10 to the -17th power sq cm, and thresholds are found for all ions except O2- which are photoactive. Vibrational, electronic and isomeric excited states are observed. Author

Descriptors:

• *CROSS SECTIONS
• *ANIONS
• *ATMOSPHERIC CHEMISTRY
• *PHOTODECOMPOSITION
• REPRINTS
• TUNABLE LASERS
• REACTION KINETICS
• PHOTODISSOCIATION
• MOLECULAR VIBRATION
• THRESHOLD EFFECTS
• EXCITATION
• OXYGEN
• ISOMERS
• CLUSTERING
• ELECTRONIC STATES
• DYE LASERS
• NITROGEN OXIDES
• CARBON DIOXIDE
• SPECTRUM ANALYSIS
• WATER VAPOR
• PHOTODEGRADATION
• DRIFT TUBE MASS SPECTROSCOPY

Subject Categories:

• Atmospheric Physics
• Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE