PREPARING REAGENTS - TIME-DEPENDENCE OF HCL(V=1, J) ALIGNMENT FOLLOWING PULSED INFRARED EXCITATION

WR SIMPSON, TP RAKITZIS, RN ZARE, Andrew J Orr-Ewing

Research output: Contribution to journalArticle (Academic Journal)peer-review

36 Citations (Scopus)

Abstract

We discuss the use of photon absorption as a means of aligning reagents for studies of dynamical stereochemistry. A linearly polarized infrared beam from an optical parametric oscillator prepares HCl(nu = 1, J = 1), and the alignment is monitored at subsequent times by (2+1) resonance-enhanced multiphoton ionization. The degree of alignment oscillates in time caused by hyperfine quantum beats. Experimental observations are well matched by calculations that account for the presence of unresolved hyperfine structure. Following reagent preparation by optical pumping, a cumulative hyperfine-depolarization coefficient can be used to describe the effective reagent alignment in a subsequent chemical reaction.

Original languageEnglish
Pages (from-to)95-102
Number of pages8
JournalIsrael Journal of Chemistry
Volume34
Issue number1
Publication statusPublished - 1994

Keywords

  • PHOTOELECTRON ANGULAR-DISTRIBUTIONS
  • ENHANCED MULTIPHOTON IONIZATION
  • DIFFERENTIAL CROSS-SECTIONS
  • QUANTUM BEAT SPECTROSCOPY
  • MOLECULAR ALIGNMENT
  • GROUND-STATE
  • DYNAMICS
  • DEPOLARIZATION
  • POLARIZATION
  • PHOTOLYSIS

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