Very low energy electron scattering in C6H5F, C6H5Cl, C6H5Br and C6H5I
作者： S L Lunt , D Field , S V Hoffmann , R J Gulley , J-P Ziesel
DOI: 10.1088/0953-4075/32/11/317
关键词: Physics 、 Scattering theory 、 Scattering length 、 Nuclear cross section 、 Atomic physics 、 Elastic scattering 、 Quasielastic scattering 、 Mott scattering 、 Scattering 、 Inelastic scattering
摘要: Integral and backward scattering cross sections are reported for the of electrons from C6H5F, C6H5Cl, C6H5Br C6H5I over energy range between 10 20 meV to eV. The measurements were made in transmission experiments using a synchrotron radiation photoionization apparatus with an resolution incident electron beam ~3.5 (FWHM). absolute accuracy is limited by experimental difficulties respect strong rotationally inelastic forward scattering, due dipolar nature target molecules. found rise more than 1500 ?2 at lowest energies C6H5Cl 2000 additional contribution attachment. At low energy, both integral very similar C6H5Br. Data interpreted terms values essentially dictated correspondingly dipole moments (1.6-1.7 D) these three species. Born model consistently underestimates overestimates degree scattering. Our data illustrate limitations estimation low-energy plasma modelling.
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