The "Stimulated Brillouin Scattering" SBS article makes note that
water due to it's conductivity isn't as good a candidate as the insulating liquids
using the laser (photon) wavelengths.
OTOH, if the CF reaction, D-D ---> He-4 + "phonon-trapped" gammas(1 to 2 Mev totaling 24 Mev )
with wavelengths comparable to the electrons create phonon vibrations in D2O
the lack of detectable external gammas is explained.
IOW, prime the pump with UV or laser photons to get things started.
Fred
