High resolution (e, 2e) spectroscopy of dimethyl ether
2014
Abstract We report high-resolution (e, 2e) spectra of dimethyl ether (H 3 COCH 3 ) 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 2b 1 and 1a 2 orbitals. The present high resolution experimental data provide a benchmark for the future rigorous theories.
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