Tunable diode laser spectrometer for pulsed supersonic jets: Application to weakly-bound complexes and clusters

Matthew D. Brookes, Changhong Xia, Jian Tang, James A. Anstey, Bryan G. Fulsom, Ke Xian Au Yong, Jenna M. King, A. R.W. McKellar

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The design and operation of an apparatus for studying infrared spectra of weakly-bound complexes is described in detail. A pulsed supersonic jet expansion is probed using a tunable Pb-salt diode laser spectrometer operated in a rapid-scan mode. The jet may be fitted with either pinhole or slit shaped nozzles, the former giving lower effective rotational temperatures, and the latter giving sharper spectral lines. Notable features of the apparatus include use of a toroidal multi-pass mirror system to give over 100 passes of the laser through the supersonic jet, use of the normal laser controller for laser sweeping during both setup and data acquisition, and use of a simple semi-automated wavenumber calibration procedure. Performance of the apparatus is illustrated with observed spectra of the van der Waals complex He-OCS, and the seeded helium clusters HeN-OCS and HeN-CO. Published by Elsevier B.V.

Original languageEnglish
Pages (from-to)3235-3242
Number of pages8
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume60
Issue number14
DOIs
Publication statusPublished - Dec 2004

Keywords

  • Data acquisition systems
  • Infrared spectra
  • Laser spectrometer
  • Spectral lines
  • Tunable diode laser
  • Van der Waals molecules
  • Weakly-bound molecules

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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