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The crystal structure of Na2Ti3O7

Sten Andersson、A. D. Wadsley1961-12-01OpenAlex

The crystal structure of Na2Ti30 ~ has been determined, using single-crystal methods. The space group is P21/m, with the unit-cell dimensions a=8.571, b=3.804, c=9.135 _~, fl=101.57 .

Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisChemical Synthesis and Characterization

The Efficiency of Production of Characteristic X-radiation in Thick Targets of a Pure Element

M Green、V. E. Cosslett1961-12-01OpenAlex

A simple theoretical expression is proposed for K quanta production in directions at large angles to the surface of a thick target, neglecting absorption. Direct and indirect production are calculated and the ratio of indirect to total production is shown to be in agreement with experimental results both in magnitude…

X-ray Spectroscopy and Fluorescence AnalysisNuclear Physics and ApplicationsElectron and X-Ray Spectroscopy Techniques

On the Mechanism of Cavitation Damage by Nonhemispherical Cavities Collapsing in Contact With a Solid Boundary

Charl F. Naude ́、A. T. Ellis1961-12-01OpenAlex

A perfect fluid theory, which neglects the effect of gravity, and which assumes that the pressure inside a cavitation bubble remains constant during the collapse process, is given for the case of a nonhemispherical, but axially symmetric cavity which collapses in contact with a solid boundary. The theory suggests the…

High-Velocity Impact and Material BehaviorUltrasound and Cavitation PhenomenaNuclear Physics and Applications

Dielectric and X-Ray Studies ofCaxBa1−xTiO3andCaxSr1−xTiO3

T. Mitsui、W. B. Westphal1961-12-01OpenAlex

Ceramics of ${\mathrm{Ca}}_{x}{\mathrm{Ba}}_{1\ensuremath{-}x}\mathrm{Ti}{\mathrm{O}}_{3}$ and ${\mathrm{Ca}}_{x}{\mathrm{Sr}}_{1\ensuremath{-}x}\mathrm{Ti}{\mathrm{O}}_{3}$ have been prepared and their dielectric and structural properties investigated. Firing conditions were adjusted to obtain sharp x-ray back reflec…

Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisInorganic Chemistry and Materials

RelativisticL-Shell Photoeffect

M. Gavrila1961-11-15Physical Review

The expressions of the relativistic $L$ shell photoeffect differential and total cross sections, for the case of light elements, are established. Coulomb wave functions are used for the description of the electron states in the calculation of the matrix elements, but it is shown how the results should be corrected so…

Atomic and Molecular PhysicsElectron and X-Ray Spectroscopy TechniquesRadiation Shielding Materials Analysis