Photoelectron Spectroscopy on Magnesium Ensembles in Helium Nanodroplets.
Lev KazakSebastian GödeKarl-Heinz Meiwes-BroerJosef TiggesbäumkerPublished in: The journal of physical chemistry. A (2019)
The electronic properties of magnesium embedded in helium nanodroplets are investigated as a function of the doping level by combining resonant two-photon ionization with photoelectron spectroscopy. Photon absorption near the atomic 31P1 ← 31S0 transition triggers the dynamics, which is probed on a nanosecond timescale by the subsequent absorption of the ionizing photon. Striking similarities in the photoelectron spectra for different doping levels and the population of atomic states well beyond 31P1 evidence an energy release process being relevant for a wide range of droplet sizes and doping conditions. From the statistical analysis, one can infer that instead of a single compact cluster size, a loosely bound Mg atom ensemble is responsible for the resulting spectra.
Keyphrases
- living cells
- single molecule
- transition metal
- high resolution
- density functional theory
- monte carlo
- molecular dynamics
- high throughput
- solid state
- radiation induced
- single cell
- fluorescent probe
- atomic force microscopy
- molecular dynamics simulations
- electron microscopy
- convolutional neural network
- machine learning
- quantum dots
- deep learning