Lifetimes and energetics of the first electronically excited states of NaH2O from time-resolved photoelectron imaging
| Autor: | Thomas E. Gartmann, Egor Chasovskikh, Ruth Signorell, Bruce L. Yoder |
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| Předmět: |
Chemistry
Relaxation (NMR) Intermolecular force Degrees of freedom (physics and chemistry) General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences Spectral line 3. Good health 0104 chemical sciences Quantum beats Excited state Physical and Theoretical Chemistry Atomic physics 0210 nano-technology Excitation Angle-resolved photoelectron spectroscopy Excited state dynamics Molecular clusters Photoelectron anisotropy Pump-probe femtosecond spectroscopy Time-resolved photoelectron spectroscopy Ultraviolet photoelectron spectroscopy |
| Zdroj: | Chemical Physics Letters Chemical Physics Letters, 683 |
| DOI: | 10.1016/j.cplett.2017.01.044 |
| Popis: | The energetics and lifetimes of the first electronically excited states (“3p-states”) of NaH 2 O and NaD 2 O have been measured by pump-probe (740/780 and 400 nm) photoelectron imaging. The photoelectron spectra of NaH 2 O show two bands at an electron kinetic energy of 0.14 and 0.38 eV, respectively. We assign the former to excitation via the two energetically close lying “p π -states” with flat potential curves in the intermolecular degrees of freedom, and the latter to the excitation via the “p σ -state” characterized by significantly steeper potential curves. The relaxation of all “p-states” follows a double exponential decay with a lifetime around 110 ps for the dominant fast component. |
| Databáze: | OpenAIRE |
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