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Resonant interatomic Coulombic decay in HeNe: Electron angular emission distributions

We present a joint experimental and theoretical study of resonant interatomic Coulombic decay (RICD) in HeNe employing high resolution cold target recoil ion momentum spectroscopy and ab initio electronic structure and nuclear dynamics calculations. In particular, laboratory- and molecular-frame ang...

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Main Authors: Mhamdi, Abir (Author) , Trinter, F. (Author) , Rauch, C. (Author) , Weller, M. (Author) , Rist, J. (Author) , Waitz, M. (Author) , Siebert, J. (Author) , Metz, D. (Author) , Janke, C. (Author) , Kastirke, G. (Author) , Wiegandt, F. (Author) , Bauer, T. (Author) , Tia, M. (Author) , Cunha de Miranda, B. (Author) , Pitzer, M. (Author) , Sann, H. (Author) , Schiwietz, G. (Author) , Schöffler, M. (Author) , Simon, M. (Author) , Gokhberg, Kirill (Author) , Dörner, R. (Author) , Jahnke, T. (Author) , Demekhin, Philipp V. (Author)
Format: Article (Journal)
Language:English
Published: 16 May 2018
In: Physical review
Year: 2018, Volume: 97, Issue: 5
ISSN:2469-9934
DOI:10.1103/PhysRevA.97.053407
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.97.053407
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.97.053407
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Author Notes:A. Mhamdi, F. Trinter, C. Rauch, M. Weller, J. Rist, M. Waitz, J. Siebert, D. Metz, C. Janke, G. Kastirke, F. Wiegandt, T. Bauer, M. Tia, B. Cunha de Miranda, M. Pitzer, H. Sann, G. Schiwietz, M. Schöffler, M. Simon, K. Gokhberg, R. Dörner, T. Jahnke, and Ph.V. Demekhin
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Summary:We present a joint experimental and theoretical study of resonant interatomic Coulombic decay (RICD) in HeNe employing high resolution cold target recoil ion momentum spectroscopy and ab initio electronic structure and nuclear dynamics calculations. In particular, laboratory- and molecular-frame angular emission distributions of RICD electrons are examined in detail. The exciting-photon energy-dependent anisotropy parameter β(ω), measured for decay events that populate bound HeNe+ ions, is in agreement with the calculations performed for the ground ionic state X2Σ+1/2. A contribution from the a2Π3/2 final ionic state is found to be negligible. For the He+Ne+ fragmentation channel, the observed laboratory-frame angular distribution of RICD electrons is explained by a slow homogeneous dissociation of bound vibrational levels of the final ionic state A2Π1/2 into vibrational continua of the lower lying states X2Σ+1/2 and a2Π3/2. Our calculations predict that the angular distributions of RICD electrons in the body-fixed dipole plane provide direct access to the electronic character (i.e., symmetry) of intermediate vibronic resonances. However, because of the very slow dissociation of the A2Π1/2 state, the molecular-frame angular distributions of RICD electrons in the He+Ne+ fragmentation channel are inaccessible to our coincidence experiment.
Item Description:Gesehen am 14.04.2020
Physical Description:Online Resource
ISSN:2469-9934
DOI:10.1103/PhysRevA.97.053407

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