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

Autor:	E. Peeters, M. Coeck, Christiane Laermans, D. A. Parshin
Rok vydání:	1998
Předmět:	Nuclear and High Energy Physics Nuclear magnetic resonance Materials science Thermal Density of states Neutron Ultrasonic sensor Irradiation Instrumentation Quartz Molecular physics Quantum tunnelling Amorphous solid
Zdroj:	Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 141:634-639
ISSN:	0168-583X
DOI:	10.1016/s0168-583x(98)00062-7
Popis:	The ultrasonic absorption is measured in neutron-irradiated quartz. The irradiation dose is 8.9×10 19 n/cm 2 ( E ⩾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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7708724b8e82aaa267ce3222f9626f00 https://doi.org/10.1016/s0168-583x(98)00062-7 Zobrazit plný text záznamu Full Text from ScienceDirect