Results 251 to 260 of about 1,272,790 (293)
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Optical Investigation of Impurities in Superfluid 4He
Journal of Low Temperature Physics, 1997This review is devoted to optical studies of foreign particles in superfluid4He. Starting with single excess electrons, helium ions and metastable helium atoms, various methods for the implantation of these species into the quantum fluid are summarized.
B. Tabbert, H. Günther, G. zu Putlitz
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Optical active media investigations by optical Kerr effect
SPIE Proceedings, 1993Systematic measurements of optically induced birefringence in some optical active solutions are reported. Relative Kerr constants `B r ' (relative to solvent), refractive indices n a (at (lambda) equals 488.0 nm) and n i (at (lambda) equals 694.3 nm), and densities `d' of the solutions under study were measured at room temperature in a wide range of ...
Zdzislaw Blaszczak, Maher Farhoud
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Magneto-optical investigations of superconductors
Superconductor Science and Technology, 1995Magneto-optical investigations of the flux distributions in high-Tc superconductors are reviewed. The various techniques (which are all based on the Faraday effect) are compared with each other concerning resolution and working range of temperature and external magnetic field.
M R Koblischka, R J Wijngaarden
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Optical investigations of silica aerogels
Journal of Non-Crystalline Solids, 1992This paper presents data on the scattering behaviour of base-catalyzed silica aerogels at a wavelength of 633 nm. Scattering from the bulk, which is nearly isotropic, and scattering from the surface, which is strongly forward peaked, were detected. The former can be influenced by changing the processing pH value and the density, but the latter has not ...
P. Wang +5 more
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Optical investigation of metamagnetic DyAlO3
Zeitschrift für Physik A Hadrons and nuclei, 1969We have investigated the optical absorption spectra of metamagnetic DyAlO3 (T N =3.4 °K) above and below the Neel temperature. We find that the magnetic interactions are predominantly between the ions along the crystallographicc-axis; the interaction energy between two ions isW C =− (
H. Schuchert, S. Hüfner, R. Faulhaber
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Optical investigation of dysprosiumaluminumgarnet (DyAlG)
Physik der Kondensierten Materie, 1965The absorption spectrum of the transitions6 H 15/2→6 F 3/2,6 F 5/2 in Dysprosiumaluminumgarnet (DyAlG) is investigated. In the antiferromagnetic state (T N =2,49°K) a splitting of the crystal field levels by an internal magnetic field is observed.
S. Hüener, M. Schinkmann, H. Schmidt
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Optical limiting investigation of metalloporphyrins
SPIE Proceedings, 2003Meso-tetrakis{4-[2-(trimethylsilyl)ethynyl]phenyl}porphyrin [TPP(4-CCTMS)_H2] and its complexes with metals Zn(II), Ni(II), Ga(III), In(III) and Sn(IV) were synthesized and characterized. Their optical limiting properties were determined under the irradiation of a 532 nm/5 ns pulse laser at the repetition rate of 20 Hz. The optical limiting performance
Guo Y. Yang +4 more
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Optical Investigations of Photosensitive Glasses
1964The use of crystalline glass materials based on photosensitive glasses in electronics makes it necessary to study processes of image formation and crystallization in such glasses. Various properties of photosensitive glasses have been studied by numerous workers [1–5].
A. A. Gorbachev +3 more
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Optical Investigations of Photosynthetic Systems
1983The biological properties of plants and photosynthetic bacteria are intimately related to their optical properties. As a matter of fact, the photosynthetic organisms are able to convert light energy into stable chemical energy.
G. Paillotin, J. Breton
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Optical investigations of superlattices
Surface Science, 1986H. Pascher +5 more
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