氧离子与氦、氖原子碰撞中转移电离过程的研究

采用位置灵敏探测和散射离子-反冲离子飞行时间测量技术,测量了氧离子与氖和氦原子碰撞过程中转移电离截面与单电子俘获截面之比.通过比较发现测量结果与文献结果的趋势一致,并对测量结果进行了讨论.     

Transfer ionization cross-sections measured in collisions of highly charged argon ions with neon target

: Multiple electron transfer processes are studied for Arq+n- Ne (q= 8, 9, 11, 12) collisions by using multi-parameter coincidence techniques. Various electron transfer processes are identified experimentally and the related cross-sections are measured. The dependence of transfer ionization cross-sections on the recoil charge states is compared with the results from the modified molecular classical overbarrier model. It is found that the modified model described the experimental results reasonably.     

Multiple ionization of argon accompanied by electron loss and capture of 0.22-6.35 MeV C^q＋ ions

In this paper a projectile ions recoil ions coincidence technique is employed to investigate the target ionization and projectile charge state changing processes in the collision of 0.22-6.35 MeV Cq^＋ （q = 1 - 4） ions with argon atoms. The partial cross section ratios of the double, triple, quadruplicate ionization to the single ionization （or the single capture） of argon associated with single electron loss （or single electron capture） by the projectile are measured and compared with the previous experimental results. In the present experiment, it is observed that the ratios of ionization cross sections R associated with single loss and single capture depend strongly on the projectile charge state and vary significantly with different reaction channels as impact energy increases. In addition, this paper gets empirical scaling laws for the ionization cross section ratios R corresponding to the projectile single loss and finds that the ratios of the double ionization to the single ionization associated with single electron capture remain constant in the present energy range.     

含噻吩环大环Schiff碱及其镧、钍配合物的合成

合成了三种新型含噻吩环大环Ｓｃｈｉｆｆ碱及其中一种与镧，钍的配合物。它们的结构均经ＩＲ，ＨＮＭＲ和元素分析表征。     

X-Ray Emission from Zr, Mo, In and Pb Targets Bombarded by Slow Highly Charged Ar^q＋（q = 13, 14, 15, 16） Ions

We study the L x-ray emission from Zr, Mo and In targets and M x-ray emission from Pb target under bombardment of low energy Ar^q (q = 13, 14, 15, 16) ions. The relative x-ray yields were measured in the projectile kinetic energy range 210-360 keV. It is found that the relative x-ray yields from Zr, Mo and Pb targets increase with the increasing projectile kinetic energy for Ar^14 and Ar^16 projectiles and depend on the potential energy of the projectile remarkably.     

磷酸盐辅助一步合成介孔Beta分子筛

在合成纳米Beta分子筛的体系中添加磷酸二氢钠等无机盐,通过一步晶化制备介孔Beta分子筛.纳米分子筛组装形成的二次粒子克服了传统纳米粒子难以过滤分离的问题,同时所形成的粒间介孔改善了分子在催化剂内的扩散从而提高催化反应效率.采用X射线衍射、扫描电镜、氮吸附-脱附和氨程序升温脱附等表征方法对材料进行表征,结果表明磷酸二氢钠的用量对介孔体积有很大影响.当NaH2PO4/SiO2摩尔比为0.1时,合成的材料具有较好的孔结构和酸性,并在叔丁醇与苯酚的液相烷基化反应中表现出最好的催化活性.     

大能量损失几何条件下剩余电子屏蔽效应的理论研究

通过考虑末通道 中剩余电子的屏蔽效应,用BBK模型及修正方案在大能量损失小动量转移几何条件下对电子电离氦原子的三重微分截面进行了计算,并从物理本质上系统地研究和分析了剩余电子的屏蔽效应在大能量损失几何条件下对三重微分截面所产生的影响.     

垂直入射几何条件下氦原子(e,2e)反应的理论研究

用BBK模型和修正后的BBK模型在电子垂直入射几何条件下对氦原子的三重微分散射截面进行了理论计算,并把计算结果与实验测量结果进行比较,对截面的结构进行了分析,并对交换效应进行了系统的研究. 关键词： DS3C模型 中间峰 屏蔽效应 交换效应     

基于ERP的(s,S)策略下库存优化控制决策支持系统

针对当前ERP软件系统无法动态地给出优化订购策略并对历史数据进行有效的分析等不足,以最小化库存费用为目标建立起折扣准则下库存优化数学模型,对ERP软件中导出的各类历史数据进行模型化分析,动态地得出各类产品(s,S)结构形式的优化订购策略.基于该模型设计并开发了库存优化控制决策支持系统,为用户提供决策支持,很大程度降低了企业库存费用.     

质子轰击元素Ta,Lu引起的原子L亚壳层顺排

用能量０．８－２．０ＭｅＶ质子束轰击元素Ｔａ、Ｌｕ使其电离，通过测量特征Ｘ射线的角分布，得到了Ｌ亚壳层原子顺排因子Ａ２和特征线Ｌｌ的极化度Ｐ，实验结果和ＰＷＢＡ理论进行了比较。基于特征偶极辐射，对原子顺排的物理图象作了解释。