A photometric investigation of the packing state of apollo 11 lunar regolith samples

Wilson, L. (1973) A photometric investigation of the packing state of apollo 11 lunar regolith samples. Planetary and Space Science, 21 (1). pp. 113-118. ISSN 0032-0633

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Abstract

The angular light scattering properties of an Apollo 11 lunar regolith 'fines' sample have been determined experimentally for both flat and undulating sample surface preparations. The light scattering curves, whose shapes are known to be a function of the porosity and slope distribution of the measured surface, have been compared with corresponding Earth-based lunar measurements. The comparison method involves the numerical fitting of theoretical photometric functions to both the astronomical and laboratory data. It is deduced that regolith material can, under favourable circumstances, maintain a very underdense structure (porosity of the surface layer greater than 90 per cent) in air, so that vacuum cold-welding is not essential in the formation of such a structure. Photometric scanning is shown to provide a rapid method of determining the effective porosity of regolith sample surfaces in the laboratory.

Item Type:
Journal Article
Journal or Publication Title:
Planetary and Space Science
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3103
Subjects:
?? astronomy and astrophysicsspace and planetary science ??
ID Code:
183753
Deposited By:
Deposited On:
11 Jan 2023 09:10
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2024 23:26