Accession Number : ADA192754

Title :   Excited-State Energetics and Dynamics of Large Molecules, Complexes and Clusters.

Descriptive Note : Progress rept. no. 2, May-Oct 85,

Corporate Author : TEL-AVIV UNIV (ISRAEL) DEPT OF CHEMISTRY

Personal Author(s) : Jortner, Joshua ; Even, Uzi

PDF Url : ADA192754

Report Date : Oct 1985

Pagination or Media Count : 6

Abstract : New techniques for spectroscopy in supersonic expansions and in the development of specific supersonic sources were developed. Vacuum Ultraviolet Absorption Spectroscopy in Supersonic Expansions. We have combined the techniques the vacuum ultraviolet (VUV) spectroscopy together with planar supersonic jets, which allows for the interrogation of absorption spectra of large molecules cooled in supersonic expansions in the near VUV region. The experimental setup consists of a high pressure Xenon lamp, Calcium fluoride optics, a vacuum ultraviolet spectrograph and a nozzle slit (0.27x90 mm, repetition rate 9 Hz and gas pulse duration 300 Micro sec). The characteristics of this spectroscopic setup are: (i) Energy range 6-10 eV. (ii) Spectral resolution 0.1 angstroms. (iii) Routine measurements of high-energy absorption spectra. (iv) Interrogation of fluorescence excitation spectra of the parent molecule.

Descriptors :   *ABSORPTION SPECTRA, *DYNAMICS, *ENERGY LEVELS, *EXCITATION, *MOLECULES, CALCIUM FLUORIDES, ENERGETIC PROPERTIES, FLUORESCENCE, GASES, HIGH ENERGY, JET AIRCRAFT, MEASUREMENT, OPTICS, PLANAR STRUCTURES, PULSES, RADIATION ABSORPTION, REGIONS, SOURCES, SPECTRA, SPECTROGRAPHS, SPECTROSCOPY, SUPERSONIC AIRCRAFT, SUPERSONIC CHARACTERISTICS, VACUUM ULTRAVIOLET RADIATION

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE