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Equation of Motion Coupled Cluster Theory Calculations of the X-ray Emission Spectroscopy of Water

The equation of motion coupled cluster theory including single and double excitations (EOM-CCSD) method is applied to study the x-ray emission spectroscopy of water. For the 1b1 orbital, a difference of about 0.7 eV is predicted between a tetrahedrally coordinated water molecule and a water molecule in which water molecules accepting hydrogen bonds are absent, and as a proton is dissociated emission from the 1b1 and 3a1 orbitals become closer in energy. The resonantly excited x-ray emission spectrum for the 4a1 orbital shows a red-shift in the bands and a reduction in intensity for the 3a1 band.
Highlights ► X-ray emission spectroscopy computed with the EOM-CCSD method. ► Calculation of the X-ray emission spectrum of water. ► Analysis of the splitting of the 1b1 band. ► Resonantly excited X-ray emission spectrum computed.

Authors:   Nicholas A. Besley
Journal:   Chemical Physics Letters
Year:   2012
DOI:   10.1016/j.cplett.2012.05.059
Publication date:   04-06-2012

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