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在150K的低温下,NO在清洁的Ru(1010)表面上的吸附,Hell-ARUPS显示在E以下9.3eV(5σ+1π)和14.6eV(4σ)处有两个峰,表明NO在Ru(1010)表面上是分子吸附,NO在Cs/Ru(1010)表面上的吸附,ARUPS测得在E以下6.2,9.2,11.1,12.4和14.9eV处有5个峰,和N2O气相的UPS谱比较认定它们是N2O和NO共存的结果,表明NO在Cs/Ru 相似文献
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用热脱附谱等方法研究了NO分别在清洁和Cs覆盖的Ru(1010)表面上的吸附.结果表明:存在两种NO分子吸附态(a1,a2),脱附温度分别处于325℃和550℃附近.Cs的存在增加了Ru(1010)表面上a2态的吸附位置,提高了该态的脱附温度.Cs在Ru(1010)表面上的存在同时促进了吸附NO分子的分解.NO在Ru(1010)表面上分解后形成吸附O原子和N原子.N原子复合以N2在约500℃附近脱附,同时Cs的存在也促进了N2O的形成.在Cs覆盖的Ru(1010)表面上,N2O的脱附温度约在425℃. 相似文献
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CO(a)与CS2和CS传能反应中激发态碎片形成速率 总被引:1,自引:0,他引:1
本文利用流动余辉技术研究了亚稳态CO(a)与CS2和CS的传能反应,测定了反应产生的激发态碎片CS(A)和CS(a)的形成速率常数。CO(a)与CS2传能反应中CS(A)和CS(a)的形成速率常数分别为3.46×10^-11cm^3·molec^-1·sec^-1和1.14×10^-10cm^3·molec^-1·sec^-1。CO(a)与CS传能反应中CS(A)和CS(a)的形成速率常数分别为1 相似文献
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四—(对—羟基苯基)卟啉在水/三氟乙酸溶液中J—聚集的光谱研究 总被引:1,自引:0,他引:1
本文研究了四-(对-羰基苯基)卟啉(TCPP)在H2O/CF3COOH、H2O/CCI3COH和H2O/CH3COOH溶液中的UV-Vis吸收光谱、荧光光谱和拉曼光谱。实验表明,TCPP在H2O/CH3COOH和H2O/CCI3COOH溶液中以分子态的N-质子化卟啉H8TCPP^2+存在,而在H2O/CF3COOH中则形成H8TCPP^2+的J-聚集体。J-聚集体显示,UV-Vis吸收光谱和荧光光 相似文献
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用角分辨XPS(Angle-resolvedXPS)研究研究了HS(CH2)10COOH(I)HS(CH2)3OC6H4N=NC6H4(CH2)7CH3(II)和HS(CH2)6HS(Ⅲ)3种分子在Au膜表面制备的自组装单分子层,得出了(I)中S原子,(Ⅱ)中S,N原子距膜表面的垂直距离,并结合构象分析确定了分子的取向和倾角,对分子(Ⅲ)则得出分子在紫外光照射下氧化反应的选择性,发现氧化主要在底层 相似文献
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本文应用Recursion方法,计算了CO在Cu(001)表面不同位置(顶位、桥位和空位)吸附的电子结构,分析了CO与Cu表面原子之间的键作用。分析表明CO在顶位吸附时,Cpx(py)-Cuds(1号)和Cpx(py)-Cud2(ds)(2号)之间存在较强的键作用,这有利于CO在顶位吸附。桥位和空位吸附时,CO与表面原子形成的键较弱,是不稳定的。计算结果得到了实验的支持。 相似文献
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Mössbauer spectroscopy was used to study rapidly quenched Fe70Cr10C10P10 amorphous alloys in order to get information about the effect of some preparation parameters on the structure and properties of the alloys. The results indicate that the Mössbauer spectroscopy can sensitively detect changes with quenching rate in these amorphous alloys. The average magnetic field decreases with increasing thickness of the samples. This cooling rate effect was compared with low temperature relaxation changes of the aged thin samples. 相似文献
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Melt of Nd60Cu20NiloAl10 alloy is solidified by rapid compression from 0.1 to 5.5 GPa at 793K and from 0.1 to 3.2GPa at 873K within 20ms, separately. A fully bulk metallic glass is obtained by the rapid compression method. By comparing with as-cast bulk metallic glass (BMG), it is found that Nd60Cu20Ni10Al10 BMG prepared by rapid compression exhibits a higher thermodynamic stability and a paramagnetic property. The relationship between the glass-formation temperature and the pressure in rapid compression for the BMG is demonstrated in the P - T phase diagram. 相似文献
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The structure functions for the 10Be and 10C nuclei are studied in a four-particle approximation (two alpha-particle clusters plus two nucleons). New versions of the αα interaction potential are constructed. Together with the nα, pα, and NN potentials proposed previously, they make it possible to describe the binding energies and radii of the nuclei being considered, along with the S-wave twocluster phase shifts at low energies. General properties of four-particle wave functions are studied, and two basic configurations of the cross and tetrahedron types are revealed in the 10Be and 10C nuclei. A detailed analysis of the behavior of the structure functions is performed for these nuclei. The density distributions, form factors, and pair correlation functions are considered. The momentum distributions are obtained for the alpha particles and extra nucleons. The structure functions for the 10Be and 10C four-cluster nuclei are compared with those for the 6He three-cluster nucleus. The bound states of the nuclei are studied within a high-precision variational approach by using Gaussian bases. 相似文献
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It is shown that the neverending oscillatory behavior of the generic solution, near a cosmological singularity, of the massless bosonic sector of superstring theory can be described as a billiard motion within a simplex in nine-dimensional hyperbolic space. The Coxeter group of reflections of this billiard is discrete and is the Weyl group of the hyperbolic Kac-Moody algebra E10 (for type II) or BE10 (for type I or heterotic), which are both arithmetic. These results lead to a proof of the chaotic ("Anosov") nature of the classical cosmological oscillations, and suggest a "chaotic quantum billiard" scenario of vacuum selection in string theory. 相似文献
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本文对小型核磁共振仪的成像特点作了深入的研究,分析了相关参数的变化对所成图像的影响,得到了小型核磁共振成像的优化规律。随后利用GYCTNMR-10小型核磁共振成像仪,对两种植物样品进行了核磁共振成像,研究表明,实验结果和理论分析非常符合。 相似文献
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