Transformations of Absorption and Emission Centers in ${\\hbox {PbWO}} _{4}$

Author

Bohacek, Pavel ; Solovieva, Natalja ; Nikl, Martin

Author_Institution

Inst. of Phys., Acad. of Sci. of the Czech Republic, Prague

Volume

55

Issue

3

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1289

Lastpage

1294

Abstract

Non-stoichiometric PWO crystals were studied at annealing experiments in various atmospheres. It was found that a substantial part of absorption centers in the PWO platelets was brought into absorption activity due to mechanical processing of their surfaces. The green emission of the type G(II) is conditioned by presence of mechanical tension at the emission centers. A new process found at annealing is the transformation of the 330/355 centers into the 340/430 centers caused by separation of lead vacancies from the former ones.

Keywords

V-centres; annealing; lead compounds; luminescence; solid scintillation detectors; vacancies (crystal); G(II) type; PbWO₄; V_O-centres; absorption transformations; annealing; green emission centers; lead vacancies; mechanical processing; mechanical tension; nonstoichiometric PWO crystals; radioluminescence spectra; scintillation detectors; Annealing; Atmosphere; Crystalline materials; Crystals; Electromagnetic wave absorption; Helium; Lead; Physics; Scintillation counters; Temperature; Absorption centers; emission centers; lead tungstate non-stoichiometric crystals; oxygen interstitials;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2007.914370

Filename

4545077