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81.
M. Deicher H. Hofsäss G. Lindner E. Recknagel Th. Wichert M. L. Swanson L. M. Howe A. F. Quenneville 《Hyperfine Interactions》1983,15(1-4):379-382
The formation of impurity-vacancy agglomerates starting with the trapping of monovacancies was studied using a combination of three complementary techniques applied to the system InCu: Perturbed -angular correlation, ion channeling and channeling of conversion electrons. This results in an almost complete picture of the first stage of vacancy agglomeration at In impurities in Cu.This work was supported by the Bundesminister für Forschung und Technologie. 相似文献
82.
O. Häusser D. Ward T. K. Alexander H. R. Andrews W. J. L. Buyers H.-E. Mahnke J. F. Sharpey-Schafer P. Skensved M. L. Swanson P. Taras 《Hyperfine Interactions》1980,8(1-3):271-281
We have examined the temperture dependence of the efg for GdGd above the Curie point. Using anI
=10+ isomer in144Gd as a probe nucleus, we find a weakT
3/2 dependence withB=(1.5±0.4) 10–5 K–3/2. The absolute value of the efg at 332 K was measured by Coulomb excitation of 2+ states in156, 158, 160Gd, yielding |eq(332 K)|=(3.43±0.14) 1017 V/cm2. A possible small deviation from theT
3/2 temperature dependence of the efg for ferromagnetic Gd is discussed. 相似文献
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Selective and sensitive polymer films for detecting explosives were studied and fabricated onto surface acoustic wave (SAW) devices. Polymers and molecular host species were self-assembled on functionalized silicon oxide surfaces through a catalytic hydrosilylation reaction. The covalently attached thin polymer films are stable, continuous and uniform with film thickness ranging from 15 to 30 nm. The microsensors coated with the polymer films show high sensitivity towards 2,4-dinitrotoluene (DNT) and o-nitrotoluene, an explosive simulant. Sensor responses to possible common interferents in land mine detection were studied and the sensor sensitivities to them were found to be much lower than that to DNT and explosives simulants. Response patterns for interferants and o-nitrotoluene were constructed and the sensors coated with functionalized cyclodextrins were able to detect 2,4-DNT and 2,4,6-trinitrotoluene (TNT) under ambient laboratory conditions. 相似文献
86.
[structure: see text] Described is the first automated solid-phase synthesis of the core N-linked pentasaccharide, common to all N-linked glycoproteins via stepwise assembly from mono- and disaccharide building blocks. The challenging beta-mannosidic linkage was incorporated by the inclusion of a disaccharide trichloroacetimidate. This automated synthesis provides rapid access to an oligosaccharide common to an entire class of glycoconjugates. 相似文献
87.
The high-resolution spectra of H216O, H218O, HD16O, HD18O, D216O, and D218O isolated in argon and krypton matrices are reported in the 10–60 cm?1 region. The high resolution is obtained by observing very dilute mixtures of water in the rare gases. No discrete absorbances attributable to pure argon or krypton are found in this region. In all cases the relative gas—matrix shifts of the isotopimers are consistent with the rotation—translation coupling model. The linewidths are found to correlate with rotation—translation coupling. The integrated intensity of the 1(1,1) — 0(0,0) transition of HDO exhibits a temperature dependence which does not deviate significantly from that expected from a Boltzmann distribution in rigid rotor energy levels. 相似文献
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