The PNNL FTIR-jet spectrometer system incorporates a continuous expansion, 12 cm x 50 micron expansion source pumped by a high throughput (6000 liter/sec) system of Roots blowers. The interaction region between the supersonic expansion and infrared radiation has been multi passed to increase the signal to noise. Rotational cooling temperatures of 10-15 K are routinely achieved. The FTIR-jet spectrometer has extensive spectral coverage form 4000 to 400 cm-1. To demonstrate the system's performance, a number of test cases including fluorocarbons, nitrous oxide monomer, nitrous oxide dimer, carbon dioxide monomer, carbon dioxide dimer, and other weakly bonded molecules will be presented.
Revised: March 10, 2009 |
Published: May 8, 2001
Citation
Sams R.L., T.A. Blake, and S.W. Sharpe. 2001.Cool Spectroscopy Using High Resolution Fourier Transform Infrared Spectroscopy. In Fourier Transform Spectroscocpy, OSA Trends in Optics and Photonics, edited by A. Sawchuk, 51, paper FThB2. Washington Dc, District Of Columbia:Optical Society of America.PNNL-SA-33750.