Application of the Nuclear Reaction Analysis Online Technique to Study the Diffusion of Deuterium in Metals

Выходец, В. Б.; Нефедова, О. А.; Obukhov, S. I.; Куренных, Т. Е.; Danilov, S. E.; Vykhodets, E. V.

doi:10.1134/s0021364018040148

Cited by 9 publications

(16 citation statements)

References 8 publications

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“…In several cases, the temperatures of the powder in the NRA measurements were À70 and 60 C, and the sample holder described in ref. 15 was used. For the experiments, the particles of the nanopowders were pressed into an indium plate.…”

Section: Methodsmentioning

confidence: 99%

“…To determine the C D values from the products of the nuclear reactions, the spectra of the samples under study were compared with that of the reference with a constant-in-depth concentration of deuterium by the procedure described in ref. [13][14][15], the reference being ZrCr 2 D 0.12 . The mean-square error in the measurements of C D was $5%.…”

Section: Methodsmentioning

confidence: 99%

“…Most measurements on the accelerator were performed at room temperature of the specimen. In several cases, the temperatures of the powder in the NRA measurements were −70 and 60 °C, and the sample holder described in ref. 15 was used.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of the defect structure of oxide nanoparticles with the use of deuterium probes

Выходец

Куренных

2020

RSC Adv.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Characterization of the defect structure of oxide nanoparticles with the use of deuterium probes

Выходец

Куренных

2020

RSC Adv.

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“…The NRAOL technique was tested by studying deuterium diffusion in nickel as a test material, and it offered satisfactory results. 16 For our experiments, we used sodium with no more than 0.1 wt % of impurities, and the sodium was stored in evacuated glass ampules. They were opened in the box (M. Braun Inertgas-Systeme GmbH) in an argon atmosphere, where the oxygen and water vapor content did not exceed 0.5 ppm.…”

Section: ■ Experimental Methodsmentioning

confidence: 99%

Quantum Diffusion of Deuterium in Sodium

et al. 2019

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The online nuclear reaction analysis technique has been applied to study the temperature dependence of deuterium diffusion coefficients for deuterium in sodium at temperatures ranging between 110 and 240 K, and at cryogenic temperatures, below 160 K, tunneling of deuterium atoms in the metal lattice has been observed. Above 160 K, diffusion occurs by the classical mechanism of overbarrier atomic jumps. Results of quantum diffusion of deuterium in a metal have been obtained for the first time; they used to be known only for the lightest hydrogen isotope, protium, in niobium and tantalum. The analysis has shown that the necessary condition for carrying out the quantum mechanism of deuterium migration is low Debye temperature of a metal, below 200 K. Experimental data on diffusion of hydrogen isotope in an alkali metal have also been obtained for the first time in this paper.

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“…After quenching the sample to room temperature the atoms become immobile and the redistributed tracer profile is frozen. The isotope profile can now be analyzed in more or less time consuming depth profile analyses with various methods like Secondary Ion Mass Spectrometry (SIMS) 5 , Nuclear Reaction Analysis 6 or sputter depth profiling of radiotracers 7 lasting at least several hours. Since more than twenty years isotope heterostructures have been used for studying self-diffusion phenomena in great detail 5 , 8 – 12 .…”

Section: Introductionmentioning

confidence: 99%

In-situ Measurement of Self-Atom Diffusion in Solids Using Amorphous Germanium as a Model System

Hüger

Strauß

Stahn

et al. 2018

Sci Rep

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We present in-situ self-diffusion experiments in solids, which were carried out by Focussing Neutron Reflectometry on isotope multilayers. This new approach offers the following advantages in comparison to classical ex-situ measurements: (1) Identification and continuous measurement of a time dependence of diffusivities, (2) significant reduction of error limits of diffusivities, and (3) substantial reduction of the necessary experimental time. In the framework of a case study, yet unknown self-diffusivities in amorphous germanium are measured at various temperatures quasi-continuously, each during isothermal annealing. A significant decrease of diffusivities as a function of annealing time by one order of magnitude is detected that is attributed to structural relaxation accompanied by defect annihilation. In metastable equilibrium the diffusivities follow the Arrhenius law between 375 and 412 °C with an activation energy of Q = (2.11 ± 0.12) eV. The diffusivities are five orders of magnitude higher than in germanium single crystals at 400 °C, mainly due to the lower activation energy.

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Application of the Nuclear Reaction Analysis Online Technique to Study the Diffusion of Deuterium in Metals

Cited by 9 publications

References 8 publications

Characterization of the defect structure of oxide nanoparticles with the use of deuterium probes

Characterization of the defect structure of oxide nanoparticles with the use of deuterium probes

Quantum Diffusion of Deuterium in Sodium

In-situ Measurement of Self-Atom Diffusion in Solids Using Amorphous Germanium as a Model System

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