X-ray and gamma irradiation effects on dipole defects in CaF2 : La, Yb, Al


Autoria(s): Arantes, L O; Ferreira, R B; Carvalhaes, R P M; Blak, Ana Regina
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2008

Resumo

Impurity-interstitial dipoles in calcium fluoride solutions with Al3+, Yb3+ and La3+ fluorides were studied using the thermally stimulated depolarization current (TSDC) technique. The dipolar complexes are formed by substitutional trivalent ions in Ca2+ sites and interstitial fluorine in nearest neighbor sites. The relaxations observed at 150 K are assigned to dipoles nnR(S)(3+)- F-i(-) (R-S = La or Yb). The purpose of this work is to study the processes of energy storage in the fluorides following X-ray and gamma irradiation. Computer modelling techniques are used to obtain the formation energy of dipole defects. (C) 2007 Elsevier Ltd. All rights reserved.

Identificador

RADIATION MEASUREMENTS, v.43, n.2/Jun, p.227-230, 2008

1350-4487

http://producao.usp.br/handle/BDPI/29435

10.1016/j.radmeas.2007.09.020

http://dx.doi.org/10.1016/j.radmeas.2007.09.020

Idioma(s)

eng

Publicador

PERGAMON-ELSEVIER SCIENCE LTD

Relação

Radiation Measurements

Direitos

restrictedAccess

Copyright PERGAMON-ELSEVIER SCIENCE LTD

Palavras-Chave #thermally stimulated depolarization currents #calcium fluoride #static computer simulation #ALKALINE-EARTH FLUORIDES #RARE-EARTH #CALCIUM-FLUORIDE #THERMAL DEPOLARIZATION #POTENTIALS #TRANSPORT #CRYSTALS #SOLIDS #Nuclear Science & Technology
Tipo

article

proceedings paper

publishedVersion