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We show unequivocal evidence for formation of He-2* excimers in liquid He II created by ionizing radiation produced through neutron capture. Laser beams induce fluorescence of the excimers. The fluorescence is recorded at a rate of 55.6...
For the purpose of future visualization of the flow field in superfluid helium-4, clusters of the triplet state excimer He-4(2)* are generated along the micro-scale recoil tracks of the neutron-absorption reaction n + He-3 -> T-3 + p....
Metastable He-2* excimer molecules have been utilized as tracer particles of the normal component in superfluid He-4 (He II) which can be imaged via laser-induced fluorescence. These excimer molecules form tiny bubbles in He II and can...
There are two commonly discussed forms of quantum turbulence in superfluid He-4 above 1 K: in one there is a random tangle of quantized vortex lines, existing in the presence of a nonturbulent normal fluid; in the second there is a...
The energy dissipation of quasiclassical homogeneous turbulence in superfluid He-4 (He II) is controlled by an effective kinematic viscosity nu', which relates the energy decay rate dE / dt to the density of quantized vortex lines L as...
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