STUDY OF THE DEEP INELASTIC SCATTERING OF 12C ON 27AI

The deep inelastic scattering of 71.5 ¹²C ions on a ²⁷Al target was measured.ΔE-E telescope was used to identify the reaction products.The contour plots in the E-θ plane for the measured cross sections in the C.M.S.for B and Be show the generalfeatures of quasi-elastic scattering at grazing angles and the deep inelastic scatteringridge extending from smaller angles and flattening at larger ones.Two special featuresmay be worthwhile to mention.First,there are some fine structures near the Q.E.peak.Secondly,the average C.M.kinetic energy of the completely damped part is notequal to the Coulomb energy of the final state.     

Y(Co1-xCux)5中子衍射研究

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质子轰击条形结构InGaAsP/InP内调Q DH双稳态激光器

本文报道一种质子轰击条形结构内调Q InGaAsP/InP DH双稳态激光器(简称BSDH)。该激光器具有典型的光输出双稳态特性,实验测得两个典型样品的双稳态工作区电流跨度△I分别为50mA,200mA,它随器件结构参数的选取而异,值得指出的是在不同注入电流下观察到高态激光输出呈单纵模稳频特性,峰值波长λ₀=1.2596μm,频率(波长)稳定度优于10^-5,本文对上述现象从物理上进行了定性的讨论。 关键词：     

5—25keV刻度用X射线发生器

利用轫致辐射激发原子产生X射线荧光,经吸收边过滤,研制成单色低中能X射线发生器。实验给出5—25keV能区的4个单能点的强度、纯度以及相应的剂量率,可供刻度使用。     

ANGULAR MOMENTUM CORRELATION OF FRAGMENTS IN DEEP INELESTIC COLLISIONS

The role of the non-diagonal difusion coefficient D12 of the two dimensional F-P EQ. In the mean value of angular momentum of fragments, their varaince and covaraince are discussed. It is found that D12 doesnot influence the equilibrium value of the quantities, but influences the rate for the quantities to reach equilibrium. So that it mainly influences the angular momentum transfer at the beginning of the reaction and that of large incident angular momentum partial waves. We also find that the covaraince is especially sensitive to D12.     

用能化电子效应考察二次离子的发射机理

用能化电子改变样品的表面势,测量多种二次离子产额的能谱,发现在通常条件下,特别当存在氧增强发射时,离子的存活几率不为共振电子隧道效应所影响。动力学参量的数据表明,决定离子产额的表面势是高度局域的。并可推论电子束照射对二次离子质谱的定量分析可起有益的效用。 关键词：     

校正空间分块镜复位误差所需的最少自由度的确定

可收展式分块镜共相位成像技术是实现光学系统超大口径、超高分辨率成像的关键技术。分块镜复位误差会引起各子镜之间的共相位误差和整个拼接镜面的面形误差。合理确定校正分块镜复位误差所需的自由度具有非常重要的意义。计算机仿真分析了分块镜的复位误差对拼接镜面面形误差的影响。结果表明,所需的校正自由度的个数不仅与展开机构的复位精度有关,而且与分块镜镜面的几何参数有关。