ULTRASONIC STUDY OF THE TUNNELING STATES IN NEUTRON-IRRADIATED QUARTZIN THE TRANSITION REGION

Authors
PEETERS E LAERMANS C PARSHIN DA COECK M
Citation
E. Peeters et al., ULTRASONIC STUDY OF THE TUNNELING STATES IN NEUTRON-IRRADIATED QUARTZIN THE TRANSITION REGION, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 141(1-4), 1998, pp. 634-639
Citations number
16
Categorie Soggetti
Instument & Instrumentation","Nuclear Sciences & Tecnology","Physics, Atomic, Molecular & Chemical","Physics, Nuclear
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
141
Issue
1-4
Year of publication
1998
Pages
634 - 639
Database
ISI
SICI code
0168-583X(1998)141:1-4<634:USOTTS>2.0.ZU;2-7
Abstract
The ultrasonic absorption is measured in neutron-irradiated quartz, Th e 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 quar tz. The experiment is carried out as a function of temperature at a fr equency of 115 MHz. The results are analyzed in the framework of the t unneling model and the soft potential model. Analysis confirms that th e density of states goes through a maximum and also shows that the cro ss-over temperature from tunneling to thermal activation is rather hig h. (C) 1998 Published by Elsevier Science B.V. All rights reserved.