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Journal
Physics Uspekhi; ISSN 1063-7869; 
; v. 56(2); p. 202-204
; v. 56(2); p. 202-204
[en] We discuss the possibilities of observing an enhancement of the pion field in finite nuclei, which should act as an indicator of real pion condensation at higher density. (orig.)
Journal
Nuclear Physics. A; ISSN 0375-9474; ; v. 335(1/2); p. 309-314
; v. 335(1/2); p. 309-314
[en] Moving vortex lattice in type-II superconductors can result in the radiation of electromagnetic waves in the range of terahertz frequency. The vortex flow dynamics in superconductors follow the London equation. In this paper, the effects of the superconductor coherence length and the London penetration depth on the radiated power is investigated by solving the London equation in the presence of vortices. The results show that by decreasing the coherence length, the radiation power will significantly increase. Also, it is possible to obtain more radiated power with a sharp peak by increasing the penetration depth. Further investigation of the effect of Joule heating reveals that radiation power is almost independent of temperature when we are far from critical temperature. But on the other hand, near the critical temperature, the radiation power is strongly dependent on the temperature variation. Also, by increasing the bias current, the radiation power will augment, and the frequency of radiated peaks will change accordingly. (paper)
Journal
Physica Scripta (Online); ISSN 1402-4896; ; v. 95(8); [6 p.]
; v. 95(8); [6 p.]
[en] Superconducting ceramic samples of the (Bi,Pb)-Sr-Ca-Cu-O system with various levels of fluorine substitution for oxygen are synthesized. The effect of partial fluorine substitution for oxygen on the phase formation and properties of superconducting phases is investigated. It is found that at low levels of fluorine substitution for oxygen the critical temperature of superconducting transition rises slightly (2-5 K depending on the content of fluorine). 12 refs
Journal
Izvestiya National'noj Akademii Nauk Armenii. Fizika; ISSN 1025-5613; ; v. 36(3); p. 148-152
; v. 36(3); p. 148-152
[en] Significant uncertainty of uranium critical point parameters in present knowledge is considered. Paper is to reveal thermodynamic aspects of the problem through comparison of some available theoretical predictions for the uranium critical point parameters as well as to discuss in brief plausible versions to meet existing contradiction. New calculations of gas-liquid coexistence in uranium by modern thermodynamic code are included in the analysis
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