Luminescence of Meteorites

A LABORATORY investigation of the luminescence spectra of a number of materials, of types which might possibly exist on the lunar surface, is being carried out with the view of permitting comparison with the luminescence spectrum of the Moon itself. We excite the luminescence in vacuum by means of a beam of protons 1 , usually with an energy of about 40 keV, and record the spectrum of any luminescence emission by means of a photoelectric spectrophotometer 2 .