Hyperfine sublevel correlation spectroscopy in lithium silicate glasses

被引：16

作者：

Astrakas, L ^{[1
]}

Deligiannakis, Y ^{[1
]}

Mitrikas, G ^{[1
]}

Kordas, G ^{[1
]}

机构：

[1] Natl Ctr Sci Res Demokritos, Inst Mat Sci, Attikis 15310, Greece

来源：

JOURNAL OF CHEMICAL PHYSICS | 1998年 / 109卷 / 19期

关键词：

D O I：

10.1063/1.477527

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

The structure of gamma-irradiated (Li2O)(0.1)(SiO2)(0.9) glass has been studied with two-dimensional hyperfine sublevel correlation spectroscopy (HYSCORE). The theoretical evaluation of the HYSCORE experimental data revealed the existence of weak couplings between the electron spin and nearby ii. The anisotropic hyperfine coupling T is equal to 4.0 MHz suggesting a nonbridging oxygen-Li distance of 2.0 Angstrom and an angle of +/-60 degrees away from the g(z) axis. The A(iso) value is equal to 0.5 MHz, corresponding to 0.135% contribution of the ii 2s orbital to the ground state. Thus, an estimation can be made of the covalent character of the bond between the nonbridging oxygen and the alkali. (C) 1998 American Institute of Physics. [S0021-9606(98)51343-8].

引用

页码：8612 / 8616

页数：5

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