Heating of Heavy Water by Acoustic Wave Propagation in Magnetic Field and Phonon Maser Action of Deuteron

抄録

Heating by less than 10°C of heavy water was observed at room temperature upon the propagation of acoustic waves of 6 MHz with intensity of about 2 W/cm² during the scanning of a magnetic field from 800 to 1000 mT. A control experiment with light water did not show the heating. As a quantitative explanation of this heating, the “spin-flip phonon maser” action of deuterons due to the thermal Raman process of spin-phonon coupling is considered. Good agreement with the experimental result was obtained. The 6 MHz acoustic waves induce the pumping transitions of the nuclear spin system.