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- W3095693670 abstract "Van der Waals (vdW) complexes with helium atoms have deserved much attention for their intriguing quantum nature relevant to microscopic superfluidity. However, tunneling splitting, the clear signature of quantum delocalization of He atoms, has rarely been identified in any of the He-containing complexes. Here, UV excitation spectra of benzene–He were extensively examined with almost full rotational resolution to identify two weak vibronic bands with vibrational excitation energies of only ∼13 and ∼16 cm–1. Each of rotational transitions appears to be split into doublets in the higher-frequency band. This splitting is attributed to quantum tunneling due to the delocalization of He spread over two minimum locations below and above the benzene ring. The magnitude of the tunneling splitting as well as the vibrational frequencies of the two vdW modes are compared with the reported theoretical prediction to quantitatively assess the intermolecular potential energy surfaces so far derived." @default.
- W3095693670 created "2020-11-09" @default.
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- W3095693670 date "2020-11-03" @default.
- W3095693670 modified "2023-10-13" @default.
- W3095693670 title "Quantum Tunneling of a He Atom Above and Below a Benzene Ring" @default.
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- W3095693670 doi "https://doi.org/10.1021/acs.jpclett.0c02879" @default.
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