Abstract
We publish three Roadmaps on photonic, electronic and atomic collision physics in order to celebrate the 60th anniversary of the ICPEAC conference. In Roadmap I, we focus on the light–matter interaction. In this area, studies of ultrafast electronic and molecular dynamics have been rapidly growing, with the advent of new light sources such as attosecond lasers and x-ray free electron lasers. In parallel, experiments with established synchrotron radiation sources and femtosecond lasers using cutting-edge detection schemes are revealing new scientific insights that have never been exploited. Relevant theories are also being rapidly developed. Target samples for photon-impact experiments are expanding from atoms and small molecules to complex systems such as biomolecules, fullerene, clusters and solids. This Roadmap aims to look back along the road, explaining the development of these fields, and look forward, collecting contributions from twenty leading groups from the field.
Highlights
Kiyoshi Ueda1, Emma Sokell2, Stefan Schippers3, Friedrich Aumayr4 and Hossein Sadeghpour5To celebrate the 60th anniversary of the ICPEAC conference, we publish a series of Roadmaps on photonic, electronic and atomic collision physics
Attosecond physics is at the core of both atomic collision physics and the development and application of new light sources based on high-harmonic generation
Is it possible to achieve chemical selectivity by using coherent ultrashort light sources? How can electronic coherences affect fragmentation after molecular excitation and/or ionization? Attosecond pump– probe and HH spectroscopies could help in answering these questions by extending the existing experimental methods— which have proven to be successful to attain sub-femtosecond electronic control in atoms and small molecules—in combination with new theoretical approaches able to describe the coupled motion of electrons and nuclei that dictate the chemistry of these systems
Summary
Light–matter interaction is dedicated to recent advances in photonic collision physics, one of the major scientific fields covered by ICPEAC In this area, studies of attosecond electronic dynamics and femtosecond molecular dynamics have been rapidly growing. Schöffler and Dörner describe the successful history of COLTRIMS reaction microscope experiments, detail how to get time-resolved information without pump– probe techniques and discuss new challenges of employing these techniques to high-repetition XFELs and high-energy ‘orbital angular momentum’ photon beams that may become available at new generation ultralow emittance synchrotron radiation sources and open untouched areas of fundamental research. We hope that the contributions to this Roadmap introduced above, which are representative of many more related scientific activities, bear vivid witness that photonic collision science has been thriving in the 60 years of ICPEAC history and continues to open new science fields with new light sources
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