Critical minima in elastic electron scattering by argon
Critical minima in elastic electron scattering by argon
复制标题
氩气弹性电子散射的临界最小值
DOI：
10.1088/0953-4075/30/24/022
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
L. Vŭsković
中科院分区：
文献类型：
--
作者：
R. Panajotović;D. Filipović;B. Marinković;V. Pejčev;M. Kurepa;L. Vŭsković
我们在实验上确定了电子被氩弹性散射的微分截面（DCS）达到最小值的两个临界点。这些点被发现是在和在。特别注意提高角分辨率，以确定最小值的确切位置。这些最小值很重要，因为它们是实验程序有效性的敏感测试，并用于验证DCS形状和大小的理论预测，以及散射电子的极化。通过测量在角范围内入射能量为10、15、20、25、30、40、50、60、75、80、90和100 eV的弹性散射电子的角分布来确定归一化DCS。结果与现有的实验和理论数据进行了比较。此外，积分，动量传递，和粘度截面测定的DCS外推到和的数值积分。
We determined experimentally two critical points in elastic electron scattering by argon where the differential cross section (DCS) attains its smallest values. The points were found to be at and at . Special attention was given to improve the angular resolution in order to determine the exact positions of the minima. These minima are important because they are a sensitive test of the validity of experimental procedures, and are used to verify theoretical predictions of DCS shapes and magnitudes, and of the polarization of scattered electrons. Normalized DCS were determined by measuring the angular distributions of elastically scattered electrons at incident energies of 10, 15, 20, 25, 30, 40, 50, 60, 75, 80, 90 and 100 eV in the angular range . Results are compared with the available experimental and theoretical data. In addition, integral, momentum-transfer, and viscosity cross sections were determined by numerical integration of the measured DCS extrapolated to and to .