Effect of phonon anharmonicity on the thermal and elastic properties of stabilized δ-plutonium

Filanovich, A. N.; Povzner, A. A.; Bodryakov, V. Yu.; Tsiovkin, Yu. Yu.; Dremov, V. V.

doi:10.1134/s1063785009100162

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…Note, that estimations of the Debye temperature presented previously for d-Pu by other authors differ significantly [35][36][37]. However, simulations within self-consistent general thermodynamic model, accounting for the effect of anharmonicity of the lattice [38] gives the same value for Debye temperature as found experimentally in Ref. [35].…”

Section: Resultssupporting

confidence: 68%

Electrical resistivity of pure transuranium metals under pressure

Tsiovkin

Lukoyanov

Шориков

et al. 2011

Journal of Nuclear Materials

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Section: Resultssupporting

confidence: 68%

Electrical resistivity of pure transuranium metals under pressure

Tsiovkin

Lukoyanov

Шориков

et al. 2011

Journal of Nuclear Materials

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“…Note, that the Debye temperature estimations 30,32,62 presented previously for δ-Pu by other authors differ significantly from each other. However, simulations within self-consistent general thermodynamic model, accounting for effect of anharmonicity of lattice 63 gives the same value for Debye temperature as found experimentally in Ref. 30.…”

Section: B Electrical Resistivity Temperature Dependencies Of Metals ...supporting

confidence: 79%

Evolution of electrical resistivity and electronic structure of transuranium metals under pressure: Numerical investigations

Tsiovkin,

Lukoyanov,

Shorikov

et al. 2010

Preprint

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The influence of electronic structure evolution upon pressure on the temperature dependencies of electrical resistivity of pure Np, Pu, Am, and Cm metals have been investigated within coherent potential approximation (CPA) for many-bands conductivity model. Electronic structure of pure actinide metals was calculated within the local density approximation with the Hubbard U and spin-orbit coupling corrections (LDA+U +SO) method in various phases at normal conditions and under pressure. They were compared with the corresponding cubic (bcc or fcc) phases. The densities of states of the latter were used as a starting point of model investigations of electrical resistivity. The obtained results were found in good agreement with available experimental data. The nature of large magnitude of resistivity of actinides was discussed in terms of the proposed conductivity model using the ab initio calculated parameters.

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“…[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] Elastic moduli are also one of a few thermodynamic susceptibilities which are essential for an understanding of the phases of Pu [39][40][41][42][43][44][45][46][47][48][49] , and with their temperature dependence are important for applications.…”

mentioning

confidence: 99%

Temperature dependence of elastic moduli of polycrystalline β plutonium

et al. 2011

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The elastic moduli of pure polycrystalline beta plutonium were measured over its full range of existence (417 K to 491 K) using resonant ultrasound spectroscopy. The Debye temperature (138 K), Poisson's ratio (0.28), Grüneisen parameter (2.3), and the zerotemperature atomic volume (21.2 Å 3 ) were computed from the measurements. Both bulk and shear moduli decrease smoothly on warming with expected discontinuities at the phase boundaries. The shear modulus is surprisingly nearly the same for beta and gamma Pu. The temperature dependence of bulk moduli for beta Pu is, like gamma Pu, unusually small. Poisson's ratio shows very strong differences among alpha, beta, and gamma Pu indicating they are entirely different metals. The zero-temperature elastic moduli were computed for the three phases as well as for gallium-stabilized delta Pu (also measured by us) and compared to calculations.PACS numbers: 62.20. de, 63.70.+h, 65.40.G-, 62.20.dj

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Effect of phonon anharmonicity on the thermal and elastic properties of stabilized δ-plutonium

Cited by 7 publications

References 12 publications

Electrical resistivity of pure transuranium metals under pressure

Electrical resistivity of pure transuranium metals under pressure

Evolution of electrical resistivity and electronic structure of transuranium metals under pressure: Numerical investigations

Temperature dependence of elastic moduli of polycrystalline β plutonium

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