Numéro
J. Phys. Radium
Volume 17, Numéro 8-9, août-septembre 1956
Page(s) 645 - 648
DOI https://doi.org/10.1051/jphysrad:01956001708-9064500
J. Phys. Radium 17, 645-648 (1956)
DOI: 10.1051/jphysrad:01956001708-9064500

Centres luminogènes dans les fluorures activés à l'uranium

W.A. Runciman

Atomic Energy Research Establishment, Harwell


Abstract
The idea of localised charge compensation is introduced, and used to obtain probable atomic configurations in uranium-activated fluorides, particular attèntion being given to uranium-activated sodium fluoride. High- dispersion fluorescence and absorption spectra of various sodium fluoride phosphors are shown and discussed. There are large effects due to other impurities present and also to cooling down from 77 °K to 4,2 °K.

PACS
3350 - Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion).

Key words
luminescence -- luminescence of inorganic substances