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Yield and ion distribution for the barium cloud at 31,000 kilometers, September 21, 1971.The photon flux density associated with the 4554-A resonance radiation for Ba II was measured at Mount Hopkins, Arizona, and Cerro Morado, Chile, and was determined to be 36,000 photon/sq cm sec outside the atmosphere; this measurement was made when the cloud was optically thin at 120 sec after release. Using this and a photon scattering efficiency of 0.66 photon/ion sec we estimate a 1.7-kg yield of barium ions that are formed from the initially released atomic barium and are thus associated with the main core of the cloud. Photographic and photometric data are combined to obtain preliminary values for the brightness throughout the cloud for two photographs, and isobrightness plots are presented. These plots indicate that the cloud is quite narrow, that a considerable portion of the ionized barium is outside the main core after a few minutes, and that the striations contain only a small fraction of the total material.
Document ID
19730057133
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Manring, E. R.
Patty, R. R.
(North Carolina State University Raleigh, N.C., United States)
Date Acquired
August 7, 2013
Publication Date
September 1, 1973
Publication Information
Publication: Journal of Geophysical Research
Volume: 78
Subject Category
Geophysics
Accession Number
73A41935
Funding Number(s)
CONTRACT_GRANT: NGL-34-002-042
Distribution Limits
Public
Copyright
Other

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