Density functionals that reproduce the helium liquid-gas interface as
a function of temperature have been used, within an improved homogeneo
us nucleation approach, to investigate thermal nucleation and cavitati
on in both helium isotopes. The results are compared with available ex
perimental data on cavitation in He-3 and He-4. Predictions are made f
or cavitation in He-3 at negative pressures and for nucleation in both
isotopes.