Two-Photon Detection Techniques for Atomic Fluorine.
Abstract
During the first year of the project, the multiphoton spectroscopy of atomic fluorine was investigated to determine if three photon excitation could be used for remote detection applications. The first observation of resonantly enhanced multiphoton ionization (REMP I) of atomic fluorine is reported. Four excited states are observed for dye laser wavelengths in the range of 286 nm corresponding to a three photon resonant transition in a 3+2 photon ionization process. REMP I spectra of molecular fluorine in a 3+1 photon process are also observed. The resonant excited states in the spectra have been identified using absorption spectra published in the literature. In the present experiment, it is estimated that 0.03 millitorr of fluorine atoms can be detected with a signal to noise ratio of two. An apparatus is under development to test the techniques of two photon excited fluorescence and coherent anti Stokes Raman spectroscopy for detection of atomic fluorine.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 11, 1986
- Accession Number
- ADA174946
Entities
People
- William K. Bischel
Organizations
- SRI International