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The electron-diffraction data for cyclohexane and perdeuterated cyclohexane were analyzed and the results were compared. It was found that rg(C-C) = 1.535 Å (±0.002) for both compounds; rg (C-H) = 1.116 Å (±0.004) and rg(C-D) = 1.109 Å (±0.003). Observed hydrogen isotope effects in mean amplitudes agree very well with calculated ones. The C-C bond distance of cyclohexane is in good agreement with some of the previous studies, which is of importance in view of a recent scaling controversy involving this parameter. 相似文献
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P.R. Newman M.D. Ewbank C.D. Mauthe M.R. Winkle W.D. Smolyncki 《Solid State Communications》1981,40(11):975-978
Observations of anisotropic transport in (CH)x reported to date have been made on stretch-oriented films in the plane of the film. We report the first observations of anisotropy in the thermal conductivity measured parallel and perpendicular to the plane of unstretched films. The room-temperature value measured along the film is , and is almost a factor of 20 higher than that observed perpendicular to the film . Finally, the temperature dependences for the parallel and perpendicular thermal conductivities are reported. 相似文献
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The thermal conductivity of tellurium dioxide is reported as a function of temperature. At 77K, the thermal conductivity is 0.09 W/cm-K and it decreases approximately as the inverse of the temperature to a value of 0.02 W/cm-K at 300K. The anisotropy between the a- and c-axes is less than 20% over the entire experimental temperature range, with the a-axis more conductive than the c-axis. By making some simplifying assumptions, the phonon mean free paths and relaxation times are deduced. 相似文献
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J. C. de Lange J. Bron A. van Poelgeest H. Verheul W. B. Ewbank 《Zeitschrift für Physik A Hadrons and Nuclei》1976,279(1):79-91
Decay studies on a number of short-lived odd nuclei in theN=50 region are described. The 59.6-s 93Ru ground state decay was studied in detail for the first time; in these experiments the 10.8-s activity93m Ru was discovered. The91Tc activities were also observed for the first time. The ground state and an isomeric state of this nucleus decay with nearby equal half-lives (3.14 and 3.3-min). The activities91g Mo (16.6-min) and95m Mo (65.1-s) have been reinvestigated. A number ofγ-rays, previously erroneously assigned to the91Mo activities, could be eliminated. A strong similarity is noted for the decay schemes of theN=49 isotones91m Mo and93m Ru. The energy of the 1/2? isomeric state in93Ru and theB(M4)-value of the isomeric transition fit well into the systematics of the previously knownN=49 isotones. 相似文献
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The hypothetical system of an ethylene-thallium(III)-water complex, C2H4-Tl3+-H2O, was used to demonstrate in principle the possibility of kinematic couplings between internal ligand and complex framework vibrations in an organometallic complex. 相似文献