Report

Photofragment Helicity Caused by Matter-Wave Interference from Multiple Dissociative States

Science  28 Aug 1998:
Vol. 281, Issue 5381, pp. 1346-1349
DOI: 10.1126/science.281.5381.1346

You are currently viewing the abstract.

View Full Text
As a service to the community, AAAS/Science has made this article free with registration.

Abstract

Isolated diatomic molecules of iodine monochloride (ICl) were photodissociated by a beam of linearly polarized light, and the resulting ground-state Cl atom photofragments were detected by a method that is sensitive to the handedness (helicity) of the electronic angular momentum. It was found that this helicity oscillates between “topspin” and “backspin” as a function of the wavelength of the dissociating light. The helicity originates solely from the (de Broglie) matter-wave interference of multiple dissociating pathways of the electronic excited states of ICl. These measurements can be related to the identity and to the detailed shapes of the dissociating pathways, thus demonstrating that it is possible to probe repulsive states by spectroscopic means.

  • * To whom correspondence should be addressed. E-mail: zare{at}stanford.edu

View Full Text