Title:	Electron attachment and quantum coherence in molecular hydrogen
Authors:	Prabhudesai, Vaibhav S. Mason, N.J. Krishnakumar, E.
Issue Date:	Jun-2020
Publisher:	IOP Publishing Ltd.
Citation:	Journal of Physics: Conference Series, 2020, Vol.1412, Article No.052006
Abstract:	Single electron attachment to a molecule may invoke quantum coherence in different angular momentum transfer channels. This has been observed in the 14 eV dissociative electron attachment resonance in molecular hydrogen where a coherent superposition of two negative ion resonant states of opposite parity is created, with the s and p partial waves of the electron contributing to the attachment process. Interference between the two partial wave contributions leads to a forward - backward asymmetry in the angular distribution of the product negative ions. Since these two resonant states dissociate to the same n = 2 state of H and H-, this asymmetry is further modified due to interference between the two paths of the dissociating molecular negative ion along different potential energy curves. This interference manifests as a function of the electron energy as well as isotopic composition. This case is akin to the quantum interference observed in photodissociation by one-photon vs two-photon absorption.
Description:	Open Access
URI:	http://hdl.handle.net/2289/7555
ISSN:	1742-6588 1742-6596 (Online)
Alternative Location:	https://ui.adsabs.harvard.edu/abs/2020JPhCS1412e2006P/abstract https://doi.org/10.1088/1742-6596/1412/5/052006
Copyright:	2020 IOP Publishing Ltd.
Appears in Collections:	Research Papers (LAMP)

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