Measurements of Ultraviolet Absorption Cross Sections of NO2 at Various Pressures and Temperatures
Abstract
An account is given of progress towards the measurements of absolute, ultra violet cross sections of N02 during the ten-month period 10/1/93-7/31/94. The accomplishments include: (a) construction of an absorption cell; (b) construction of vacuum system; (c) the assembly of an optical system including focusing of a 6.65 m spectrograph; (d) obtaining high resolution photographic spectra of N02 in absorption; and (e) the first measurements of cross sections of N02 at 295 K. The high resolution absorption spectrum of N02 has been obtained from National Research Council of Canada. The high resolution cross sections of N02 at 295 K have been measured photoelectrically in the wavelength region 390-452 nm. No pressure dependency has been observed. The absolute cross section scale agrees with published values, but there are large wavelength shifts in earlier works
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1994
- Accession Number
- ADA283835
Entities
People
- Kouichi Yoshino
- W. H. Parkinson
Organizations
- Harvard College Observatory