1975 .

(3 publications)

M. Ackerman, J. C. Fontanella, D. Frimout, A. Girard, N. Louisnard, and C. Muller. Simultaneous measurements of NO and NO2 in the stratosphere. Planetary and Space Science, 23:651-660, April 1975. [ bib | DOI | ADS link ]

NO and NO2 were measured by infrared absorption in the stratosphere, using the sun as a light source, in the 5.2 and 6.2 micron bands respectively. These measurements lead to a composite picture of NOx distribution. The composition reaches a peak at 26 km, where it equals (4.2 plus or minus 1) times 10 to the ninth power per cu cm. The volume mixing ratio of NOx varied from 1.3 times 10 to the minus ninth power at 20 km to 1.3 times 10 to the minus eighth power at 34 km.

C. Muller and A. J. Sauval. The CO fundamental bands in the solar spectrum. Astronomy Astrophysics, 39:445-451, March 1975. [ bib | ADS link ]

The result of a study of CO lines in the delta v equals 1 bands in the solar disk spectrum is presented. Recently, the photospheric spectrum has been recorded using a balloon-borne spectrometer from 40 km altitude. From a comparison between the observed and synthetic solar spectra, an agreement is shown using the best available solar and molecular data. Results are discussed and compared with other investigations in order to explain an apparent discrepancy between previous results.

C. Muller, B. Lorentz, and M. Remy. Existence of He - ions in a duoplasmatron discharge. Physics Letters A, 51:17-18, January 1975. [ bib | DOI | ADS link ]

We point out the presence of He - ions in a duoplasmatron discharge and detect currents of 10 -15 A. The influence of different parameters on this current is indicated and possible processes for the formation of He - ions are investigated.