Development of multi-channel apparatus for electron-atom Compton scattering to study the momentum distribution of atoms in a molecule

We have developed multi-channel apparatus for electron-atom Compton scattering to study the momentum distribution of atoms in a molecule. It combines the features of both a spherical electron energy analyzer and a large-area position sensitive detector, thereby having an ability to cover almost comp...

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Published in:Review of scientific instruments 2017-06, Vol.88 (6), p.063103-063103
Main Authors: Yamazaki, Masakazu, Hosono, Masaki, Tang, Yaguo, Takahashi, Masahiko
Format: Article
Language:English
Subjects:
Atomic beam spectroscopy
Backscattering
Elastic scattering
Electron energy analysers
Momentum
Position sensing
Scientific apparatus & instruments
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description We have developed multi-channel apparatus for electron-atom Compton scattering to study the momentum distribution of atoms in a molecule. It combines the features of both a spherical electron energy analyzer and a large-area position sensitive detector, thereby having an ability to cover almost completely the azimuthal angle range available for quasi-elastic electron Rutherford backscattering at an angle of 135°. Details and performance of the apparatus are reported, together with experimental results measured for Xe and CH4 at an incident electron energy of 2 keV. In particular, it is shown that the instrumental sensitivity is remarkably high, which has increased the signal count rate by nearly three orders of magnitude compared to existing setups. This technical progress would be useful for advancing atomic momentum spectroscopy studies.
doi_str_mv 10.1063/1.4986459
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP_美国物理联合会现刊（与NSTL共建）
subjects Atomic beam spectroscopy
Backscattering
Elastic scattering
Electron energy analysers
Momentum
Position sensing
Scientific apparatus & instruments
title Development of multi-channel apparatus for electron-atom Compton scattering to study the momentum distribution of atoms in a molecule
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