Structural relaxation of E′γ centers in amorphous silica -: art. no. 113201

被引：41

作者：

Agnello, S

Boscaino, R

Buscarino, G

Cannas, M

Gelardi, FM

机构：

[1] Univ Palermo, Ist Nazl Fis Mat, I-90123 Palermo, Italy

[2] Univ Palermo, Dept Phys & Astron Sci, I-90123 Palermo, Italy

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.66.113201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report experimental evidence of the existence of two variants of the E-gamma(') centers induced in silica by gamma rays at room temperature. The two variants are distinguishable by the fine features of their line shapes in paramagnetic resonance spectra. These features suggest that the two E-gamma(') differ in their topology. We find a thermally induced interconversion between the centers with an activation energy of about 34 meV. Hints are also found for the existence of a structural configuration of minimum energy and of a metastable state.

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页码：1 / 4

页数：4

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