A Device for Precise Isothermal Sample Annealing in an Accelerator Chamber

Rybakov, V.N.; Suchkov, A. V.; Выходец, В. Б.; Obuhov, S. I.

doi:10.1134/s0020441219010172

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“…Devices for assembling samples and their annealing are described in the Supporting Information section and in works. 3,21,22 Examinations using methods of nuclear reactions (NRAs) showed that the samples were of purity sufficient for diffusion experiments, the oxygen content did not exceed 0.2 at. % and no nitrogen or carbon impurities were detected.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…To heat and cool samples, a resistive furnace and flow-through liquid nitrogen were employed, the temperature being the lower boundary of diffusion investigations. Devices for assembling samples and their annealing are described in the Supporting Information section and in works. ,, Examinations using methods of nuclear reactions (NRAs) showed that the samples were of purity sufficient for diffusion experiments, the oxygen content did not exceed 0.2 at. % and no nitrogen or carbon impurities were detected.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Debye Temperature and Quantum Diffusion of Hydrogen in Body-Centered Cubic Metals

et al. 2022

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Diffusion of deuterium in potassium is studied herein. Mass transfer is controlled predominantly by the mechanism of overbarrier atomic jumps at temperatures 120–260 K and by the tunneling mechanism at 90–120 K. These results together with literature data allowed us to determine conditions under which the quantum diffusion of hydrogen in metals can be observed, which is a fundamental problem. It is established that in metals with a body-centered cubic lattice tunneling can be observed only at temperatures below the Debye temperature θD solely for metals with θD < 350 K. Predictions are made for metals in which quantum diffusion of hydrogen can be experimentally registered. Metals for which such results cannot be obtained are specified as well. Among them are important engineering materials such as α-Fe, W, Mo, V, and Cr.

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Section: Experimental Methodsmentioning

confidence: 99%