The filament formation by impurities embedding into superfluid helium

The hydrogen molecules embedded in superfluid helium as a gas jet are shown to form long thin filaments. These filaments survived under helium transition to a normal phase demonstrating their conjugated entity. The concentration of an impurity in the core of vortex may be the mechanism of the impurity coalescence providing a cotton-like structure of a condensate obtained by the impurities contained gas helium jet introduction to He-II.