Electrons Trapped in Solid Neon–Hydrogen Mixtures Below $$1\, \hbox {K}$$

Sheludiakov, S.; Ahokas, J.; Järvinen, J.; Lehtonen, Liisa; Vasiliev, S.; Dmitriev, Yu. A.; Lee, David M.; Khmelenko, V. V.

doi:10.1007/s10909-018-02135-w

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…Unlike D αζ and D γδ lines, the central, D βǫ , line of trapped D atoms in this sample possessed a broad shoulder at the high-field side (Fig. 2a) which we attributed to trapping electrons in a pure Ne environment similar to that observed in the ESR spectra center of Ne:H 2 samples in our previous work [13,22]. The presence of a strong deuterium D βǫ line in the center of the ESR spectrum (Fig.…”

Section: Resultssupporting

confidence: 66%

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Evidence for melting of HD and D2 clusters in solid neon below 1 K

Sheludiakov

Ahokas²,

Järvinen

et al. 2019

Phys. Rev. B

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We report on an electron spin resonance study of H and D atoms stabilized in solid mixtures of neon, molecular deuterium and hydrogen deuteride. We observed that H and D atoms can be stabilized in pure HD and D2 clusters formed in pores of solid Ne as well as in a Ne environment. Raising temperature from 0.1 to 1.3 K results in a rapid recombination of a significant fraction of both H and D atoms in HD and D2 clusters. The recombination rate appears to be five and seven orders of magnitude faster than in solid bulk samples of HD and D2, respectively. We explain this recombination rate enhancement by melting of clusters of molecular hydrogen isotopes, similar to what has been observed for atomic hydrogen in H2 clusters [Sheludiakov et al. Phys. Rev. B 97, 104108 (2018)]. Our observations do not provide evidence for a superfluid behavior of these clusters at temperatures of 0.1-1.3 K.

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Section: Resultssupporting

confidence: 66%

“…The presence of a strong deuterium D βǫ line in the center of the ESR spectrum (Fig. 2a) made it difficult to reliably distinguish a presence of the ESR line of electrons trapped in D 2 clusters [22] formed in the Ne:1%D 2 sample.…”

Section: Resultsmentioning

confidence: 99%

Evidence for melting of HD and D2 clusters in solid neon below 1 K

Sheludiakov

Ahokas²,

Järvinen

et al. 2019

Phys. Rev. B

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Single electrons on solid neon as a solid-state qubit platform

Zhou

Koolstra

Zhang

et al. 2022

Nature

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Matrix-Assisted Processes in CH4-Doped Ar Ices Irradiated with an Electron Beam

Bludov,

Khyzhniy,

Uyutnov

et al. 2023

Methane

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The relaxation processes induced by exposure of the Ar matrices doped with CH4 (0.1–10%) to an electron beam were studied with a focus on the dynamics of radiolysis products—H atoms, H2 molecules, CH radicals, and energy transfer processes. Three channels of energy transfer to dopant and radiolysis products were discussed, including free charge carriers, free excitons and photons from the “intrinsic source” provided by the emission of the self-trapped excitons. Radiolysis products along with the total yield of desorbing particles were monitored in a correlated manner. Analysis of methane transformation reactions induced by free excitons showed that the CH radical can be considered a marker of the CH3 species. The competition between exciton self-trapping and energy transfer to the dopant and radiolysis products has been demonstrated. A nonlinear concentration behavior of the H atoms in doped Ar matrices has been established. Real-time correlated monitoring of optical emissions (H atom and CH3 radicals), particle ejection, and temperature revealed a nonmonotonic behavior of optical yields with a strong luminescence flash after almost an hour of exposure, which correlated with the explosive pulse of particle ejection and temperature. The connection of this phenomenon with the processes of energy transfer and recombination reactions has been established. It is shown that the delayed explosive ejection of particles is driven by both the recombination of H atoms and CH3 radicals. This occurs after their accumulation to a critical concentration in matrices at a CH4 content C ≥ 1%.

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Electrons Trapped in Solid Neon–Hydrogen Mixtures Below $$1\, \hbox {K}$$

Cited by 3 publications

References 28 publications

Evidence for melting of HD and D2 clusters in solid neon below 1 K

Evidence for melting of HD and D2 clusters in solid neon below 1 K

Single electrons on solid neon as a solid-state qubit platform

Matrix-Assisted Processes in CH4-Doped Ar Ices Irradiated with an Electron Beam

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