Exotic behavior of hydrogen atoms in solid H2 at temperatures below 1 K.
We present the first magnetic resonance study of atomic hydrogen embedded in solid H2 films for temperatures 150-900 mK. We found that at T approximately 150 mK average concentrations of H atoms of order 10(18 cm(-3) are very stable against recombination during two weeks of observations. The distribution of the population of the two lowest hyperfine states is found to be non-Boltzmann, with a very large occupation of the ground state. We consider the possibility of formation in solid H2 of regions with high local concentrations of H atoms, where collective quantum phenomena might occur.
Ahokas
J
J
Wihuri Physical Laboratory, Department of Physics, University of Turku, 20014 Turku, Finland.
Järvinen
J
J
Khmelenko
V V
VV
Lee
D M
DM
Vasiliev
S
S