Use Of A Free-Expansion Jet In Ultrahigh Resolution Raman Spectroscopy

James J. Valentini; Peter Esherick; Adelbert Owyoung

doi:10.1117/12.932057

30 December 1981 Use Of A Free-Expansion Jet In Ultrahigh Resolution Raman Spectroscopy

James J. Valentini, Peter Esherick, Adelbert Owyoung

Proceedings Volume 0288, Los Alamos Conf on Optics '81; (1981) https://doi.org/10.1117/12.932057
Event: Los Alamos Conference on Optics, 1981, Los Alamos, United States

Abstract

Rotationally-resolved, ultra-high-resolution stimulated Raman spectra of CH₄, CD₄, and SF₆ have been obtained in cw and pulsed free-expansion jets, using a simple and inexpensive nozzle-and-vacuum-chamber apparatus. Through variation of the nozzle orifice diameter, nozzle backing pressure, and axial location of the spectroscopic probe region it is possible to nearly independently control the spectral Doppler width, rotational temperature, and molecular density in the jet. Using relatively mild expansion conditions we have been able to cool a pure methane jet to a rotational temperature of 13K. We show here how this con-trol of temperature, independent of density, allows separation of otherwise unresolvable spectral features and unambiguous identification of band-heads, hot-bands, and other spec-tral features.

Citation Download Citation

James J. Valentini, Peter Esherick, and Adelbert Owyoung "Use Of A Free-Expansion Jet In Ultrahigh Resolution Raman Spectroscopy", Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); https://doi.org/10.1117/12.932057

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available