Low-frequency acoustic properties of neutron-irradiated quartz

Autor: Christian Enss, S. Hunklinger, Christiane Laermans, I. Rohr, J. Classen
Rok vydání: 1999
Předmět:
Zdroj: Physica B: Condensed Matter. :139-142
ISSN: 0921-4526
DOI: 10.1016/s0921-4526(98)01330-1
Popis: We present results of low-frequency acoustic (vibrating reed) measurements on quartz crystals irradiated with six different neutron doses up to 2×10 20 n/cm 2 in the temperature range from 7 mK to 1 K. From the temperature dependence of the sound velocity and of the internal friction information on the density of states of tunneling states and their coupling to phonons is obtained. Comparisons are made with recent ultrasonic measurements.
Databáze: OpenAIRE