Upgrades to existing facilities and commissioning of new ones promise improved time resolution down to the attosecond regime and higher repetition rates. Steber and Tikhonov describe the development of large-scale free electron laser (FEL) facilities for production of extremely intense, ultrashort, coherent pulses, and how they, combined with theoretical advances, have revolutionized the understanding of the dynamics of molecules in the gas phase over the last decade and a half. implementing pump–probe schemes with two attosecond pulses for high temporal resolution and improved control, and to combine such ultrafast techniques with cryogenic storage devices and isomer selection methods. Maclot and Johnsson open up the roadmap describing how table-top high-order harmonic generation (HHG) techniques may be used to produce attosecond extreme ultraviolet (XUV) pulses with the aim to unravel ultrafast electron and nuclear dynamics in molecules and clusters in unprecedented detail. In this roadmap article, we present nineteen contributions where a combination of early career and more experienced researchers shares their views on the advances and future challenges within their areas of expertise. These advances include: (i) preparations of neutral and chargedmolecules and clusters in well-defined quantum states and structures (isomers) (ii) cryogenic storage of ions in new time domains (iii) pump–probe schemes using advanced light sources and table-top laser systems (iv) new spectroscopic techniques and methods to monitor emission of fragments, electrons and photons and (v) theoretical and computational tools to treat the dynamics from ultrafast to ultraslow timescales (attoseconds to minutes and beyond). Recent experimental and theoretical advances offer unique possibilities to study the electronic and structural dynamics of molecules interacting with different forms of radiation such as photons, electrons or heavier particles (ions, atoms, molecules). Henning Zettergren, Alicja Domaracka, Thomas Schlathölter, Paola Bolognesi, Sergio Díaz-Tendero, Marta Łabuda, and Sanja Tosic.Ĭore group of the MD-GAS COST Action CA18212. The European Physical Journal D volume 75, Article number: 152 ( 2021) Roadmap on dynamics of molecules and clusters in the gas phase Topical Review - Molecular Physics and Chemical Physics.
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