Accession Number : AD0771319

Title :   Time Evolution of Unimolecular Processes in Isolated Molecules by Crossed Laser and Molecular Beams.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF CHEMISTRY

Personal Author(s) : Riley,Stephen J. ; Sander,Robert K. ; Wilson,Kent R.

Report Date : 24 NOV 1973

Pagination or Media Count : 17

Abstract : The authors have developed a new technique, double absorption photofragment spectroscopy, in which a molecular beam is crossed with an initiation laser pulse followed, after a delay time, by a probe laser pulse and observe the recoiling photodissociation fragments with a mass spectrometer. This technique should allow the observation of the time development of unimolecular processes in isolated molecules over a time span from picoseconds to milliseconds. A first demonstration has been performed, the observation of the time evolution of predissociation in I2B state molecules as a function of their vibrational and rotational state distribution.

Descriptors :   *Iodine, *Molecular spectroscopy, Experimental design, Excitation, Molecular energy levels, Molecular beams, Laser beams, Photochemical reactions, Dissociation, Mass spectroscopy, Pulses

Subject Categories : Radiation and Nuclear Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE