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Digitale Medien

Structural modifications of the superconducting phases on Bi system by electron beam irradiation (1996)

Aldica, G. ; Geru, I. I. ; Puscasu, B. M. ; [weitere]

Springer

Journal of superconductivity 9 (1996), S. 273-276

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ISSN: 1572-9605

Schlagwort(e): Electron irradiation ; Bi-Pb-Sr-Ca-Cu-O high-T c phases ; phases stability ; microstructure transformations ; transmission electron microscopy

Quelle: Springer Online Journal Archives 1860-2000

Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik

Notizen: Abstract Superconducting samples of the Bi(Pb)-Sr-Ca-Cu-O system have been irradiated in transmission electron microscopy (TEM) to investigate the effect of a relative high fluence of electrons with 75 and 100 keV energy on the microstructure of the material. The diffraction pattern images show a dramatic change from very uniform lattice spots atab crystalline planes to a circular pattern corresponding to damage and breaking of the materials in very small crystallites.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00727547

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Digitale Medien

Taylor series for the dirac function on perturbed surfaces with applications to mechanics (1985)

Codaccioni, R. Caboz J.-P. ; Constantinescu, F. ; Meister, E.

Chichester, West Sussex : Wiley-Blackwell

Mathematical Methods in the Applied Sciences 7 (1985), S. 416-425

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ISSN: 0170-4214

Schlagwort(e): Mathematics and Statistics ; Applied Mathematics

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Mathematik

Notizen: Let H0 be the Hamiltonian of an unperturbed oscillating system and let V be a small perturbation which is analytic in a neighborhood of the surface H0 = E, E 〉 0.If H0 = H + λ V is the total Hamiltonian, we prove that there is a Taylor expansion of the Dirac function δ for small |λ|When applied to test functions which are analytic near H0 = E.The connection of this result with the classical Lagrange-Bürmann theorem and some applications to the mechanics of non-linear systems are discussed.

Zusätzliches Material: 2 Ill.