Abstract
A SINGLE crystal of lithium iodide activated with an impurity of 0.05 mol. per cent europous chloride has been grown from the melt and found to be a relatively efficient scintillator. The crystal is clear and transparent except for a slight non-uniform purple coloration. Under 2537 A. ultra-violet excitation the luminescence is a strong blue very like that of anthracene. A section of the boule was cut and finished with 320-grit abrasive paper into a cylinder of 2 cm. diameter by 1.5 cm. long. The finished crystal was mounted in an atmosphere of dry nitrogen within a polished aluminium reflecting-cup1 sealed at the open end with a ‘Lucite’ light-piper and joined to a 5819 photomultiplier.
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References
Jordan, W. H., “Annual Review of Nuclear Science”, 1, 220, Fig. 4 (1952).
Siegbahn, K., Phys. Rev., 70, 127 (1946).
Bell, P. R., and Jordan, W. H., Phys. Rev., 79, 392 (1950).
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SCHENCK, J. Activation of Lithium Iodide by Europium. Nature 171, 518–519 (1953). https://doi.org/10.1038/171518a0
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DOI: https://doi.org/10.1038/171518a0
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