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- Title
Studies of the Structures of Nitrogen-Neon Nanoclusters Immersed into Superfluid Helium-4.
- Authors
Wetzel, C. K.; Lee, D. M.; Khmelenko, V. V.
- Abstract
We studied the electron spin resonance (ESR) spectra of nitrogen atoms stabilized in nitrogen-neon nanoclusters immersed in superfluid 4 He. The nanoclusters were formed during the condensation of the products of the discharge in N 2 –Ne–He gas mixtures into bulk superfluid 4 He at temperature 1.5 K. We studied nanoclusters formed by injection of gas mixtures with different ratios of heavy impurities in the helium N 2 /(Ne + N 2 ) ranging from 2% to 90%. Analysis of the ESR spectra of nitrogen atoms stabilized in nitrogen-neon nanoclusters provides important information about the environment of the stabilized atoms and a shell structure of the nanoclusters was revealed. For all samples studied, preferential stabilization of N atoms on the surfaces of the nanoclusters was observed. Annealing of the collection of the nanoclusters in the temperature range 1.1–10 K resulted in substantial changes in the structure of the nanoclusters.
- Subjects
NEON; ELECTRON paramagnetic resonance; SUPERFLUIDITY; NITROGEN; ATOMIC spectra; GAS mixtures; GAS injection
- Publication
Journal of Low Temperature Physics, 2024, Vol 215, Issue 5/6, p294
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-023-03026-5