A novel cryogenic molecular beam. Application to supersonic jet spectroscopy of gases

✍ Scribed by J. Ballard; D. Newnham; M. Page

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 348 KB
• Volume: 208
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)89078-v

✦ Synopsis

A novel method for molcctdar supersonic free-jet spectroscopy, which uses a cryopump rather than mechanical pumps to maintain a low background pressure, is described. Advantages ofthis method include its low cost, relative ease of installation in many types of spectrometer and the potential for efficient recovery of valuable samples. The technique has been demonstrated with a compact liquid-nitrogen cryopump installed in the sample compartment of an FIIR spectrometer. Jet-cooled infrared rovibrational spectra of CO1, NO1 and N,O., indicate a similar degree of rotational and vibrational cooling as that obtained using conventional mechanical pumps.