SCATTERING OF 2ND SOUND-WAVES BY QUANTUM VORTICITY

A new method of detection and measurement of quantum vorticity by scat tering second sound off quantized vortices in superfluid helium is sug gested. Theoretical calculations of the relative amplitude of the scat tered second sound waves from a single quantum vortex, a vortex lattic e, and bulk vorticity are presented. The relevant estimates show that an experimental verification of the method is feasible. Moreover, it c an even be used for the detection of a single quantum vortex.