Direct observation of intramolecular atomic motion in H2 and D2 by using electron-atom Compton scattering

Yuichi Tachibana, Masakazu Yamazaki, Masahiko Takahashi

Research output: Contribution to journalArticlepeer-review

Abstract

We report electron-atom Compton scattering experiments on the H2 and D2 molecules. Energy-loss spectra of electrons quasielastically backscattered at an angle of 135° are measured as a function of azimuthal angle at an incident electron energy of 2.0 keV. Momentum distributions of the H and D atoms due to molecular vibration are extracted from the experimental data by using a protocol that we propose here. The results are successfully compared with theoretical ones predicted by the molecular vibrational wave functions. It is shown that electron-atom Compton scattering has a unique ability to provide direct information about intramolecular motion of each atom with different mass numbers.

Original languageEnglish
Article number032506
JournalPhysical Review A
Volume100
Issue number3
DOIs
Publication statusPublished - 2019 Sep 4

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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