Thermoluminescence Dynamics During Destructions of Porous Structures Formed by Nitrogen Nanoclusters in Bulk Superfluid Helium
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2016, Springer Science+Business Media New York. We studied the dynamics of thermoluminescence during destruction of porous structures formed by nanoclusters of nitrogen molecules containing high concentrations of stabilized nitrogen atoms. The porous structures were formed in bulk superfluid helium by injection of the products of discharges in nitrogenhelium gas mixtures through the liquid helium surface. Fast recombination of nitrogen atoms during warming-up led to explosive destruction of the porous structures accompanied by bright flashes. Intense emissions from the -group of nitrogen atoms, the -group of oxygen atoms and the VegardKaplan bands of N2 molecules were observed at the beginning of destruction. At the end of destruction the M- and -bands of NO molecules as well as bands of O2 molecules were also observed. Observation of the emissions from NO molecules at the end of destruction was explained by processes of accumulation of NO molecules in the system due to the large van der Waals interaction of NO molecules. For the first time, we observed the emission of the O2 molecules at the end of destruction of the porous nitrogen structures as a result of the (NO)2 dimer formation in solid nitrogen and subsequent processes leading to the appearance of excited O2 molecules.
