CROSSED-BEAM EXPERIMENT FOR THE SCATTERING OF LOW-ENERGY ELECTRONS FROM CF4

被引：78

作者：

BOESTEN, L ^{[1
]}

TANAKA, H ^{[1
]}

KOBAYASHI, A ^{[1
]}

DILLON, MA ^{[1
]}

KIMURA, M ^{[1
]}

机构：

[1] ARGONNE NATL LAB,ARGONNE,IL 60439

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1992年 / 25卷 / 07期

关键词：

D O I：

10.1088/0953-4075/25/7/029

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Differential scattering cross sections (DCS) for electron-CF4 collisions in the energy range from 1.5 to 100 eV were measured with a crossed beam instrument for scattering angles of 15-degrees to 130-degrees. The DCS are normalized by reference to He. Integral and momentum transfer cross sections are compared with measurements of total cross sections, swarm experiments and theory. The integrated DCS show a broad structure at 7 eV of symmetry T2 as predicted by theory, and one broad peak from 15 to 25 eV. The observed peaks differ in magnitude and angular distribution from recent SMC calculations. Evidence of a shape resonance of T2 symmetry was observed in the recorded angular distributions for vibrational modes nu(0), nu(1), nu(3), and nu(4). In addition a large cross section for nu(3) excitation with 2 eV electrons was found to occur by a direct mechanism.

引用

页码：1607 / 1620

页数：14

共 51 条

[41] DISSOCIATIVE ATTACHMENT AND ION-PAIR FORMATION IN CF4, CHF3, CH2F2, AND CH3F UNDER LOW-ENERGY (0-20 EV) ELECTRON-IMPACT [J].