Study of the stabilization and recombination of nitrogen atoms in impurity-helium condensates
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Stabilization and recombination of nitrogen atoms N(4S) in nitrogen-helium and nitrogen-neon-helium condensates created by injecting of impurity particles from a gas discharge into superfluid helium were investigated by the EPR method. It Is found that the stabilized nitrogen atoms mainly reside inside and on the surfaces of Impurity clusters, which form a porous structure in the bulk of superfluid helium, A possibility of increasing the specific energy content of impurity-helium condensates by mechanical compression Is studied. An 8-fold increase of the energy density was achieved for the nitrogen-helium samples. The recombination of the nitrogen atoms N(4S) in the Impurity-helium condensates on warming through the temperature range 1.7-7 K was detected. This allowed verification of the mechanism of thermoluminescence for the impurity-helium condensates to be clarified.
author list (cited authors)
Boltnev, R. E., Krushinskaya, I. N., Pelmenev, A. A., Popov, E. A., Stolyarov, D. Y., & Khmelenko, V. V.