Accession Number : ADA192471

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

Descriptive Note : Progress rept. no. 5, 1 Nov 86-30 Apr 87,

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

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

PDF Url : ADA192471

Report Date : 30 Apr 1987

Pagination or Media Count : 13

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 of 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. Development of Conical Nozzles for Supersonic Jets. Conical nozzles (nozzle opening angle theta = 30, and nozzle diameter D = 0.3 mm) were constructed and used in conjunction with a magnetic pulsed valve. The use of conical nozzles considerable enhances clustering in supersonic expansions, facilitating studies of large van der Waals complexes and clusters.

Descriptors :   *CONICAL NOZZLES, *MOLECULES, *SUPERSONIC AIRCRAFT, *VACUUM ULTRAVIOLET RADIATION, ABSORPTION SPECTRA, ANGLES, DYNAMICS, ENERGETIC PROPERTIES, ENERGY LEVELS, EXCITATION, JET AIRCRAFT, MAGNETIC FIELDS, NOZZLES, OPENING(PROCESS), PLANAR STRUCTURES, PULSES, RADIATION ABSORPTION, REGIONS, SOURCES, SPECTROSCOPY, SUPERSONIC CHARACTERISTICS, VALVES

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE