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Etude spectroscopique et R.P.E. du pentaphosphate de cerium

Authors
Journal
Materials Research Bulletin
0025-5408
Publisher
Elsevier
Publication Date
Volume
12
Issue
5
Identifiers
DOI: 10.1016/0025-5408(77)90110-6
Disciplines
  • Physics

Abstract

Abstract Under ultraviolet excitation cerium pentaphosphate CeP 5O 14 shows emission with a quantum efficiency almost independant of the Ce 3+ concentration and temperature. Energy transfer between the Ce 3+ ions is not efficient. Decay measurements have been performed and Ce 3+ decays with τ 1 = 13 10 −9s and τ 2 = 41 10 −9s independently of Ce 3+ concentration and temperature. The electron spin resonance spectra of Gd 3+ in Ce 1−xGd xP 5O 14 twin-free crystal are reported and the angular variations of the absorption lines have been fitted to the spin Hamiltonian corresponding to Cs symmetry. Twin-free crystals, selected by EPR measurements, exhibit only the τ 2 lifetime, τ 1 can be induced mechanically in the course of the crash the initially twin-free crystal.

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