A Possible Macroscopic-Photo-Catalysis Mechanism in Solar Furnace

Based on the experimental results of Chen et al. to use the solar furnace and medium frequency induction furnace to extract boron impurity from metallurgical silicon, we propose a strong radiation catalysis mechanism to explain the difference of reaction rates in these two furnaces. The postulate assuming the photons striking on the material not only increase the thermal energy of the molecules of reactants but also lower down the energy barrier of the reaction to speed up the chemical reaction. It is believed the photon catalysis mechanism is universal in most of high temperature chemical reactions and looking forward to more evidences for the postulate proposed in this article.     

永久磁铁周期性聚焦电子束

在余弦式及非余弦式周期磁场下描写电子轨迹的傍轴方程曾用微扰法求解,得到了一些最佳聚焦条件。在推导中考虑了空间电荷效应及阴极被部分屏蔽的情况,当电子束在周期场中波动比较大时这些结果也能应用。另外用变振幅的方法研究了电子束在周期磁场内的稳定性问题,得到了一些包含有空间电荷密度及阴极屏蔽程度在内的稳定性条件。并绘出图线表示禁区位置因各种不同空间电荷密度及阴极屏蔽程度而改变的情况,知道虽然在用全屏蔽的电子枪情况下,正如过去一些著者所指出的,禁区位置不因空间电荷密度的大小而改变,但在阴极被部分屏蔽的情况下,空间电荷     

Ag110m的衰变纲图

利用γ闪烁谱仪和γ—γ符合谱仪,我们对Ag^110m衰变的γ射线进行了研究;提出了一个修正的衰变纲图,认为Cd¹¹⁰有656kev,1473kev,1540kev,2160kev,2219kev,2476kev和2924kev七个激发能级,包含有能量为448,620,656,679,705,741,764,817,884,936,1384,1473,1504和1560kev的14条γ射线。用符合方法,我们除了证实一般公认为有级联关系的γ射线之间有符合之外,还确定了1560kevγ射线在衰变图中的位置,证实了764kevγ射线应该放在1504kevγ射线的前面,并且指出,817kevγ射线是属于1473kev能级到656kev能级间的跃迁的。此外,还观察到1820kev和2268kev两个峰;经过用吸收方法分析,指出它们是由于低能量的γ射线“堆积”起来的迭加峰。     

为原子核科学研究用的原子核乳膠核-2,核-3,制备方法的研究

本文对于原子核乳胶核—2、核—3制备方法中的几个主要问题进行了初步研究。通过这些研究,我们掌握了制备过程中各种主要因素的关系和它们对于乳胶性能的影响,从而制成了性能良好的原子核乳胶。我们用控制乳化过程中溴离子浓度的方法解决了颗粒大小均匀问题;选择适当的成熟条件和用三乙醇胺增感解决了乳胶对质子的灵敏度问题;用加金盐的方法解决了潜影衰退问题;用纯化明胶的方法解决了雾点问题。     

铝单晶体滑移的电子顯微镜颧察(一)

滑移是晶髓笳性形燮中的最重要遇程. 在以往许多髓滑移工作中,     

Ni-Mg,Mg-Mn和Ni-Zn三种铁氧体在3厘米波段的法拉第旋转及衰耗

Faraday rotation and loss characteristics at 9200 me and at room temperature of Ni-Mg, Mg-Mn and Ni-Zn ferrite rods and disks placed in a circular waveguide are measured as a function of applied longitudinal DC magnetic field.Of particular interest are the results obtained with a new type of Ni-Mg ferrites, since very little data on Ni-Mg ferrites have been published in the literature. In this paper sufficient data are given on Faraday rotation and loss characteristics of a complete range of nickel-magnesium ferrites with composition varying from pure nickel to pure magnesium. Experimental results at 9200 me indicate that for the sintering temperature of 1300℃, the best composition range for nickel-magnesium ferrites would be Ni_0.7Mg_0.3Fe₂O₄-Ni_0.8Mg_0.2Fe₂O₄. In future, nickel-magnesium ferrites, due to their very low loss, may find practical applications in the microwave field.Comparison information as to the relative merits of these three useful microwave ferrites are given in the form of curves and tables, and their results are discussed in some detail.This paper also gives a summary of the linear theory on Faraday rotation of a linearly polarized wave propagating in ferrite-loaded waveguide which is longitudinally magnetized.     

ZnWO4晶体中W原子的配位数

本文依据X射线结构数据和Raman光谱测量,分析了闪烁体ZnWO₄单晶中W原子的配位情况。得出在属黑钨矿结构的ZnWO₄中,认为W的配位数Z为6较4要合适些,即把发光中心看作是WO₆原子基团比WO₄^-2离子更合适些。同时得到四条ZnWO₄晶体的Raman新谱线。 关键词：     

半导体中的杂质能级

分析了杂质原子在半导体中的成键情况,我们在一般能带波函数中混入部分分子型局域波函数,从而得到带有修正项的有效质量方程。在简单能带结构情况下,我们讨论了电离能与原子性质的关系,及由浅能级向深能级的转化。进而分析了由于Ge、Si中导带各极值所产生的谷轨道分裂。对浅能级,由于键间相互作用,电离能可以有相对较大的修正,但波函数却变化很小,这与电子自旋共振超精细结构的实验结果一致。 关键词：