Abstract Details
| A High Throughput Soft X-ray Emission Spectrometer at SSRL | |
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| Abstract ID | I&D-06 |
| Presenter | Dennis Nordlund |
| Presentation Type | Poster |
| Full Author List | Dennis Nordlund (1) , Hirohito Ogaswara (1) , Lars-Ake Naslund (1) , Jan-Olof Forsell (1) , Anders Nilsson (1) |
| Affiliations | (1) SLAC |
| Category | Instrumentation/Development |
| Abstract | A new soft x-ray emission spectrometer has been developed at SSRL for studies of adsorbates on surfaces and liquid samples in the soft x-ray region. It is based on laminar gratings operated in negative order using an elliptical substrate to minimize figure errors, designed with high throughput and simple operation in mind. |
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| Funding Acknowledgement | |
| Probing the Electron Delocalization in Liquid Water and Ice at Attosecond Time Scales | |
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| Abstract ID | MAT-15 |
| Presenter | Dennis Nordlund |
| Presentation Type | Poster |
| Full Author List | Dennis Nordlund (1) , Hirohito Ogaswara (1) , Hendrik Bluhm (2) , Osamu Takahashi (5) , Michael Odelius (3) , Mitsuru Nagasono (4) , Lars GM Pettersson (3) , Anders Nilsson (1) |
| Affiliations | (1) SLAC/SSRL (2) LBL/ALS (3) Stockholm University (4) SPRING8/RIKEN (5) Hiroshima Univ |
| Category | Materials Science |
| Abstract | We determine electron delocalization rates in liquid water and ice using core-hole decay spectroscopy. The hydrogen-bonded network delocalizes the electrons in less than 500 as. Broken or weak hydrogen bonds—in the liquid or at the surface of ice—provide states where the electron remains localized longer than 20 fs. These asymmetrically bonded water species provide electron traps, acting as a strong precursor channel to the hydrated electron. |
| Footnotes | |
| Funding Acknowledgement | |
| Electronic Structure Effects in Liquid Water Studied by Photoelectron Spectroscopy and Density Functional Theory | |
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| Abstract ID | MAT-14 |
| Presenter | Dennis Nordlund |
| Presentation Type | Poster |
| Full Author List | Dennis Nordlund (1) , Michael Odelius (3) , Hendrik Bluhm (2) , Hirohito Ogasawara (1) , Lars GM Pettersson (3) , Anders Nilsson (1) |
| Affiliations | (1) SLAC/SSRL (2) LBL/ALS (3) Stockholm University (4) SPRING8/RIKEN (5) Hiroshima Univ |
| Category | Materials Science |
| Abstract | We present valence photoelectron emission spectra of liquid water in comparison with gas-phase water, ice close to the melting point, low temperature amorphous and crystalline ice. All aggregation states have major electronic structure changes relative to the free molecule, with rehybridization and development of bonding and anti-bonding states accompanying the hydrogen bond formation. Sensitivity to the local structural order, most prominent in the shape and splitting of the occupied 3a1 orbital, is understood from the electronic structure averaging over various geometrical structures, and reflects the local nature of the orbital interaction. |
| Footnotes | |
| Funding Acknowledgement | |