Dielectric properties of Apollo 11 lunar samples and their comparison with Earth materials
1970; American Geophysical Union; Volume: 75; Issue: 32 Linguagem: Inglês
10.1029/jb075i032p06524
ISSN2156-2202
AutoresD. H. Chung, W. B. Westphal, Gene Simmons,
Tópico(s)Space Exploration and Technology
ResumoJournal of Geophysical Research (1896-1977)Volume 75, Issue 32 p. 6524-6531 Dielectric properties of Apollo 11 lunar samples and their comparison with Earth materials D. H. Chung, D. H. ChungSearch for more papers by this authorW. B. Westphal, W. B. WestphalSearch for more papers by this authorGene Simmons, Gene SimmonsSearch for more papers by this author D. H. Chung, D. H. ChungSearch for more papers by this authorW. B. Westphal, W. B. WestphalSearch for more papers by this authorGene Simmons, Gene SimmonsSearch for more papers by this author First published: 10 November 1970 https://doi.org/10.1029/JB075i032p06524Citations: 30AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Presented here are values of dielectric permittivity, dissipation factor, and electrical conductivity of Apollo 11 lunar samples 10020, 10057, and 10046 in the frequency range 100 Hz to 10 MHz and temperature range from −196°C to + 200°C. The dielectric properties determined on earth basalts and a simulated lunar material with the composition of the Surveyor 5 results are used to characterize the dielectric properties of these lunar samples. We conclude that: (1) the lunar samples have higher values of the dielectric constant than terrestrial basalts, an effect due probably to the presence of ilmenite in the lunar samples, and the high-frequency dielectric constant of the lunar igneous samples is about 9 to 15, whereas that of the lunar breccia is about 6 to 9; (2) the lunar samples show greater dielectric losses than terrestrial basalts, and the loss tangents measured on the lunar igneous samples are consistently higher than those of the lunar breccia, ranging from 0.09 to 0.2 for the igneous samples and 0.5 to 0.09 for the breccia; (3) the electrical conductivity values for the lunar samples are 10−9 to 10−11 (ohm cm)−1, and the electrical conductivity of the lunar igneous samples depends more strongly on temperature than that observed for the lunar brecica; (4) all the lunar samples show a temperature-dependent, low-frequency dispersion that may be due to the combined effect of impurity charges and moisture in the samples that is absorbed from the atmosphere. Citing Literature Volume75, Issue3210 November 1970Pages 6524-6531 This article also appears in:Apollo 11 Symposium RelatedInformation
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