一类广义 Fibonacci 准晶电子能谱分析

讨论一类广义Ｆｉｂｏｎａｃｃｉ准周期链ｏｎ＿ｓｉｔｅ模型的电子能谱，其原子排列由Ｂ→Ａ，Ａ→ＡＢＢ产生。重整化群方法分析表明，一级近似时能谱为五主支结构；二级近似时每个主支又有三分支。数值计算结果证实了以上的分析，但并未发现有明显的连续谱，这与ｔｒａｎｓｆｅｒ模型的谱不同。     

高分子材料时-温等效性的研究(Ⅲ)高分子材料的力学状态非线性松弛活化能谱的研究

在前两篇中为探讨高分子材料的力学状态松弛活化能谱,提供了理论依据及大量的实验事实,本文对实验数据进行了理论分析,得到了不同高分子材料在不同的力学状态下的松弛活化能和活化能谱。并从不同力学状态下的活化能大小出发,对活化能谱作了解释,文献上尚未有这方面的报导。     

Periodicity of sunspot activity in the modern solar cycles

Sunspot number, sunspot area and sunspot unit area are usually used to show sunspot activity. In this paper,periodicity of sunspot activity of modern solar cycles has been investigated through analyzing the monthly mean values of the three indices in the time interval of May 1874 to May 2004 by use of the wavelet transform. Their global power spectra and local power spectra are given while the statistical tests of these spectra are taken into account. The main results are (1) the local wavelet power spectrum of the sunspot number seems like that of the sunspot area, indicating that the periodicity of the both indices is similar. The local power spectrum of the sunspot unit area resembles the local power spectra of the previous two indices, but looks more complicated. (2) the possible periods in sunspot activity are about 10.6 (or 10.9 years for the sunspot unit area), 31,and 42 years, and the period of about 10.6 years is statistically significant in the considered time. For the periods of about 31 and 42 years, their power peaks are under the 95% confidence level line but over the mean red-noise spectral line, and for the other rest periods, their power peaks are even under the mean red-noise spectral line, which are statistically insignificant. (3) the local power of the three periods is higher in the late stage than in the early stage of the considered time. (4) the period characteristics of the three indices, shown in the global power spectra and the local power spectra, are similar but there is difference in detail.     

偶偶Xe与Ba同位素核的HF态及能谱研究

采用修正表面δ相互作用，对＾１１６Ｘｅ，＾１１８Ｘｅ，＾１２２Ｂａ和＾１２６Ｂａ五个偶偶核作了核变ＨＦ计算，得到长椭球，扁椭球和一些激发态的解。结果表明，在质量１１６－１２６的原子 核间存在形状过渡，且单粒子能级随质量数及组态的不同而不同。一     

一类具有能谱E_n=E_1·n~2的新可解势

利用正、逆超对称变换的复合,我们从一维无限深方势阱的哈密顿算符出发得到了一类具有能谱形式为E_n=E_1·n~2的新可解势,并给出了在该势场中粒子能量本征函数的明星形式。     

CO偶联反应Pd/α-Al2O3催化剂失活的XPS研究

利用失活Pd/α Al2O3催化剂的X 光电子能谱(XPS)探讨了氨气引起Pd/α Al2O3催化剂失活的原因.分析认为氨分子在活性组分Pd2+上的竞争吸附阻碍了催化剂表面上CO偶联反应及活性组分Pd的氧化还原循环,导致催化剂活性下降.     

Pt/Ni双层金属膜修饰n~+/n-Si电极的研究

用Pt、Ni或Pt/Ni金属膜修饰n~+/n-Si半导体表面后作为光阳极,在Fe(CN)_6~3-/4-溶液中组成光电化学电池,在最佳操作条件和65mW/cm~2光强时转换效率为7.4％。研究了金属膜的厚度对电池性能的影响。对半导体电极表面进行了X-光电子能谱分析。