Study of the stabilization and recombination of nitrogen atoms in impurity–helium condensates
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The stabilization and recombination of nitrogen atoms N(4S) in nitrogen-helium and nitrogen-neon-helium condensates obtained by the injection of impurity particles from a gas discharge into bulk superfluid helium are investigated by the EPR method. It is established that the stabilized nitrogen atoms reside inside and on the surface of impurity clusters forming a porous structure in the bulk superfluid helium. The possibility of increasing the specific energy of impurity-helium condensates by increasing their density through mechanical pressing is investigated. For nitrogen-helium condensates an eightfold increase in the specific energy is achieved. The recombination loss of N(4S) upon heating of impurity-helium condensates in the temperature range 1.7-7 K is detected. This permits verification of the mechanism of thermoluminescence of impurity-helium condensates. © 2005 American Institute of Physics.
author list (cited authors)
Boltnev, R. E., Krushinskaya, I. N., Pelmenev, A. A., Popov, E. A., Stolyarov, D. Y., & Khmelenko, V. V.