We report on experiments performed with droplets of supercooled liquid H₂, maintained in a state of neutral buoyancy in pressurized ⁴He fluid. We have measured the nucleation rate for solidification as a function of temperature, and have observed and analyzed several interesting hydrodynamic effects relating to the motion of the drops and interactions between them. We discuss the possibility of supercooling liquid H₂ to sufficiently low temperatures to observe the superfluid phase.
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Maris et al. (1987) studied this question.
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