@article{9b920574c6994fa9b9132c72e4272ae2,
title = "Ultrasonic study of the tunneling states in neutron-irradiated quartz in the transition region",
abstract = "The ultrasonic absorption is measured in neutron-irradiated quartz. The irradiation dose is 8.9 × 1019 n/cm2 (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.",
keywords = "Low temperature properties, Neutron irradiation, Quartz, Ultrasonics",
author = "Els Peeters and Christiane Laermans and Parshin, {D. A.} and M. Coeck",
year = "1998",
month = may,
doi = "10.1016/S0168-583X(98)00062-7",
language = "English",
volume = "141",
pages = "634--639",
journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",
issn = "0168-583X",
publisher = "Elsevier B.V.",
number = "1-4",
}