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Luminescence and Thermoluminescence Induced by Bombardment with Protons of 159 Million Electron Volts

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Science  30 Jan 1970:
Vol. 167, Issue 3918, pp. 715-717
DOI: 10.1126/science.167.3918.715


We have observed a red luminescence, qualitatively similar to that of enstatite achondrites, in unsorted fines, their separated mineral phases, and rock chips. The energy efficiency of the plagioclase fraction is approximately 1 percent. At -196°C the effect is enhanced by a factor between 1 and 2. All fractions except ilmenite exhibit blue thermoluminescence with a glow peak near -135°C and an energy efficiency ≈ 4 x 10-6. Unlike the thermoluminescence of terrestrial and meteoritic material, it is nonrepeatable even after annealing at 200°C. Similar thermoluminescence is seen in rock chips, but in unsorted fines it is masked by the opaque fractions.

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