C2H4-K体系中振动态至电子态传能的研究

用TEA CO_2激光将C_2H_4分子激发到高振动激发态，高振动激发态的C_2H_4分子与基态的K原子碰撞发生振动态→电子态（V→E）传能过程，根据提出的能级组模型，对测得的时间分辨原子荧光信号进行处理，获得温度在453－663 K范围内，C_2H_4-K体系中V→E传能速率的数量级为10~(-10)/cm~3·molecule~(－1)·s~(－1)，对应的碰撞传能截面约为0.30～0.80 nm．随着反应温度升高，V→E传能截面减小．上述实验结果表明碰撞体间吸引相互作用在这种非共振的V→E传能过程中起主要作用．利用多极相互作用势下的碰撞络合物模型对实验结果进行了讨论．     

K＋I~2→K^+＋I~2^-离子对生成反应态－态几率与 选态截面的量子散射理论研 究

本文用Miller的-矩阵变分法在Aten-Lanting-Los两态势能面上计算了K＋I~2→K^+＋I~2^-电离反应的态－态几率和选态反应截面,结果表明了低电离阈能、几率的振荡行为及振动增强效应;电离截面随碰撞能及I~2振动量子数的变化规律与实验预测相吻合;讨论了反应机理。     

矩形截面毛细管电泳和二维分离

在石英单晶表面制成矩矩截面毛细管柱中进行电泳实验。由于矩形柱比圆形柱有更大散热侧面积且石英单晶的导热性能远无于熔融石英，所以可施加较高的场强，不仅提高了柱效，而且缩矩了分离时间。两相交的通道之间形成自然连接，可实现二维分离，并消除死体积。     

有心圆锥曲线上四点的两种不同形式类西摩松线

根据文[1],直线l及其平行线被有心圆锥曲线L截得弦的中点和曲线L的中心都在同一直线l’上,直线l’叫有心圆锥曲线L关于直线l的共轭直径.有心圆锥曲线中类西摩松线的内容是:在中心为O的圆锥曲线L上任取三点A、B、C,曲线L关于直线BC、CA、AB的共轭直径分别为OD、OE、OF,在曲线L上取异于A、B、C的一点     

Cross section of the impact single ionization of B2＋ by H＋

The ionization process of B2+ by H+ impact is studied using the continuum-distorted-wave eikonal-initial-state (CDW-EIS) method and the modified free electron peak approximation (M-FEPA), respectively. Total, single-, and double- differential cross sections from 1s and 2s orbitals are presented for the energy range from 10 keV/u to 10 MeV/u. Comparison between the results from the two methods demonstrates that the total and single-differential cross sections for the high-energy incident projectile case can be well evaluated using the simple M-FEPA model. Moreover, the M-FEPA model reproduces the essential features of the binary-encounter (BE) bump in the double-differential cross sections. Thus, the BE ionization mechanism is discussed in detail by adopting the M-FEPA model. In particular, the double- and single-differential cross sections from the 2s orbital show a high-energy hip, which is different from those from the 1s orbital. Based on Ref. [1], the Compton profiles of B2+ for 1s and 2s orbitals are given, and the hips in DDCS and SDCS from the 2s orbital are explained.     

（e, 2e） Investigations of the Simultaneous Ionization and Excitation of Helium to He＋（n=2）

Three-Coulomb-wave method is employed to treat the process of （e, 2e） simultaneous ion- ization and excitation to the n=2 state of helium, with radial and angular correlated wave-function of He target. The triple differential cross sections are calculated and analyzed in very asymmetric coplanar geometry at incident energies of 5.50, 1.50 and 0.57 keV. Results are compared with the absolute measurements and the theoretical first and second Born approximation. The present triply differential cross section （TDCS） is found to be in good agreement with experimental data qualitatively. The distinguishing feature noted in TDCS structure is the presence of intense recoil peak that for certain parameters is even larger than the binary peak, an unusual feature for the single-ionization process at high and intermediate energies.     

基于双CCD的大型轴类零件直径非接触检测方法研究

针对重型机械工业生产中对大型轴类零件外径测量的需求,基于双CCD传感器测量原理研究了一种新型高效率、高精度的轴径检测方法。介绍了CCD测径系统的检测原理,针对单一CCD传感器测量范围小的缺点,提出了双CCD传感器组合测量大型轴类零件直径(Φ150mm~Φ300mm)的方法,并对影响精度的主要误差来源进行了分析。为了验证该方法的有效性,通过对7种不同直径的标准轴件进行测量,实验表明,测量精度小于±3μm,满足大型轴类零件外径测量的要求。