Longitudinal Ultrasound Velocity and Attenuation in Isotopically Enriched Cadmium
The results of the acoustic-properties’ study of high-purity (>99.999%) cadmium enriched to 66.4% with the isotope ¹⁰⁶Cd and to 82.2% with the isotope ¹¹⁶Cd are presented for the temperature range of 77–300 K. Isotopic effects are observed in the temperature dependence of the 50 MHz ultrasound pr...
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| Дата: | 2018 |
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| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут металофізики ім. Г.В. Курдюмова НАН України
2018
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| Назва видання: | Металлофизика и новейшие технологии |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/151876 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Longitudinal Ultrasound Velocity and Attenuation in Isotopically Enriched Cadmium / A.S. Bulatov, G.P. Kovtun, V.S. Klochko, A.V. Korniets, D.A. Solopikhin, A.P. Shcherban // Металлофизика и новейшие технологии. — 2018. — Т. 40, № 11. — С. 1465-1473. — Бібліогр.: 13 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The results of the acoustic-properties’ study of high-purity (>99.999%) cadmium enriched to 66.4% with the isotope ¹⁰⁶Cd and to 82.2% with the isotope ¹¹⁶Cd are presented for the temperature range of 77–300 K. Isotopic effects are observed in the temperature dependence of the 50 MHz ultrasound propagation velocity and attenuation. A comparison of the sound velocity data for the ¹⁰⁶Cd and ¹¹⁶Cd samples has revealed a first-order isotopic effect with a characteristic linear dependence on the isotopes’ masses difference, and it determines the phonon-spectrum change caused by the isotope composition. Measuring the attenuation of the longitudinal ultrasound made it possible to detect a second-order isotopic effect with a quadratic dependence on the isotopes’ masses difference. The quadratic effect is due to a disordered isotope distribution, and it causes an additional relaxation mechanism for phonon scattering. |
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