Observation of Three-Body Recombination in Spin-Polarized Hydrogen

Abstract
Three-body recombination in spin-polarized hydrogen has been observed. Doubly polarized hydrogen was compressed by a piston into a thin cell and the temperature and pressure were independently monitored. Measurements were carried out in the temperature range 0.3 to 0.45 K in a magnetic field of 8.0 T at densities up to 1.5×1018 cm3. The results are in good agreement with the theory of Kagan, Vartanyants and Shlyapnikov.