Abstract
The mechanism for the thermal decomposition of N 2 containing impurity helium solids (IHS) in superfluid 4He is reported. We show that the solid undergoes rapid thermal annealing leading to mobilization of the nitrogen atoms. Subsequently, the nitrogen atoms form molecular N 2 excimers, which are mobile in the solid and are responsible for various emission bands observed over the thermal decomposition of IHS. The present interpretation of the spectroscopic results indicates that IHS contains only ground state atomic species.
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PACS numbers: 33.20 Kf, 33.70 Jg
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Popov, E., Ahokas, J., Eloranta, J. et al. Thermal Decomposition Mechanism of N2-Impurity Helium Solids. J Low Temp Phys 139, 557–562 (2005). https://doi.org/10.1007/s10909-005-5443-5
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DOI: https://doi.org/10.1007/s10909-005-5443-5