Letter | Published:

Luminescence of Solutions of Terbium Salts

Nature volume 139, pages 248249 (06 February 1937) | Download Citation



VERY dilute aqueous solutions of terbium salts exhibit a bright luminescence when excited by the ultra-violet rays1. The maximal excitation is caused by the absorption of the wave-lengths coinciding with the broad absorption band of terbium, stretching from 290 m far towards the short wave-lengths2. The spectrum of this luminescence consists of 7 bands, each band being nearly 100 A. wide. The wavelengths and frequencies of the middles of the bands are given in the accompanying table.

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  1. 1.

    , , and , C.R. Acad. Sci. U.S.S.R., (10) 1, 253 (1936).

  2. 2.

    , und , Z. anorg. und allg. Chem., 220, 107 (1934).

  3. 3.

    , ” Theory of Electric and Magnetic Susceptibilities”, p. 246 (Oxford, 1936).

  4. 4.

    , Phys. Rev., 49, 876 (1936).

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  1. Commission for the Study of the Rare Earths of the Academy of Sciences of the U.S.S.R., Leningrad. Dec. 22.

    • A. SEIDEL


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