Abstract
We report high-resolution (e, 2e) spectra of dimethyl ether (H3COCH3) in combination with high-level theoretical calculations. The observed binding energy spectra and momentum distributions were compared with Hartree–Fock, density functional theory (DFT), and symmetry-adapted-cluster configuration-interaction (SAC-CI) calculations. In general, the theoretical momentum distributions based on Dyson orbital (DO) and Kohn–Sham orbital (KSO) agree well with the experimental momentum distributions except the discrepancies in the low momentum regions of 2b1 and 1a2 orbitals. The present high resolution experimental data provide a benchmark for the future rigorous theories.
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