Ultrasonic study of the tunneling states in neutron-irradiated quartz in the transition region

被引：2

作者：

Peeters, E

Laermans, C

Parshin, DA

Coeck, M

机构：

[1] Katholieke Univ Leuven, Dept Phys, B-3001 Louvain, Belgium

[2] Leningrad State Tech Univ, St Petersburg 195251, Russia

[3] CEN SCK, Dept BR2, B-2400 Mol, Belgium

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1998年 / 141卷 / 1-4期

关键词：

neutron irradiation; ultrasonics; low temperature properties; quartz;

D O I：

10.1016/S0168-583X(98)00062-7

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The ultrasonic absorption is measured in neutron-irradiated quartz, The irradiation dose is 8.9 x 10(19) n/cm(2) (E greater than or equal to 0.3 MeV). Due to this irradiation dose, the sample is situated in the transition region between mainly crystalline and fully amorphous quartz. The experiment is carried out as a function of temperature at a frequency of 115 MHz. The results are analyzed in the framework of the tunneling model and the soft potential model. Analysis confirms that the density of states goes through a maximum and also shows that the cross-over temperature from tunneling to thermal activation is rather high. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：634 / 639

页数：6

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