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Luminescence Excitation by Protons and Electrons, Applied to Apollo Lunar Samples

Published online by Cambridge University Press:  07 February 2017

J. E. Geake ,
G. Walker  and
A. A. Mills
J. E. Geake
Affiliation:
UMIST, Manchester, England
G. Walker
Affiliation:
UMIST, Manchester, England
A. A. Mills
Affiliation:
University of Leicester, England

Abstract

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A proton accelerator, modified for work on lunar samples, is described; 60 keV protons at about 1 μA cm−2 are used. Luminescence emission spectra in the visible and near IR regions are shown for lunar samples from Apollo 11 and 12, and preliminary results are given for Apollo 14 samples. Lunar samples are compared with terrestrial and meteoritic materials. Plagioclase is found to be the most efficient luminescent material present in the lunar samples, and the activator for its dominant green peak is found to be Mn2+.

Apparatus is described for taking colour photographs of the luminescence emission from rock chips under 6 keV electron excitation. Most of the lunar samples investigated show only plagioclase emission, but one breccia shows a wide variety of colours from different luminescent constituents.

Type
Part II: Scientific Papers
Information
Symposium - International Astronomical Union , Volume 47: The Moon , 1972 , pp. 279 - 297
Copyright
Copyright © Reidel 1972 

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