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Atomic and Molecular Physics, Dilute Matter, Universe Science


AtMol: Atomic and Molecular physics, diluted mater, atmosphere, univers


recherche AtMOLWithin the Dilute Matter Scientific Group, the objects we are dealing with are atoms, molecules, clusters, non-covalent complexes and nanoparticles which are studied in a solvent-free and substrate-free environment. Because inter-molecular collisions and solvent-molecule interactions may be neglected, this “dilute matter” regime offers, as compared to the condensed matter, the opportunity to study model or actual systems at the elementary level, with in general the help of ab-initio calculations which can be carried out at the highest level. Besides, dilute matter is optically thin, therefore it can be studied continuously over the whole spectrum, and especially in the spectral range covered by the SOLEIL beamlines, from the far IR to the tender X-rays.

With the large array of complementary associated techniques available or under development on our beamlines, we are able to interrogate these isolated species over a vast energy range in conditions such that a single photon interacts with a single molecule. Such studies provide us with a better knowledge of fundamental photon/matter interaction, intra- and intermolecular processes as well as subsequent dynamics. This crucial information on elementary bricks of matter can be used to understand and build up more complex and structured matter

Very schematically, our scientific activity cover 3 main axes:

• Fundamental research on dilute samples: molecular structures and photodynamics

• Towards interfaces with other scientific fields: chemistry, biology, astronomy & astrophysics and planetary science

Instrumental developments.





Under constructions

What we do

Research areas : technique of analysis

Gas Phase 

  • Astrophysics
  • Photodynamics
  • Molecular, electronic structure



IR and THz spectroscopy
VUV spectroscopy

Photoelectron emission
Angular Resolved PES Photoelectron (ARPES)
Coincidence electron/ion (PEPICO)
Time-resolved studies

Ion Spectroscopy
Mass spectrometry



Actual Members

Under construction

Laurent Nahon

DESIRS Beamline - Group Leader

AtMol Section Coordinator


Nelson De Olivera

Beamline Scientist DESIRS



Gustavo Garcia

Beamline Scientist DESIRS



Dusan Bozanic




Abhyday Chatterjee

PhD Student DESIRS Beamline




John Bozek

PLÉIADES Beamline - Group Leader


Aleksandar Milosavljevic

 Beamline Scientist PLÉIADES



Fabian Holzmeier



Alexandre Guilliani

Associate research Scientist DISCO




Olivier Pirali

Associate research

Scientist AILES / ISMO


Marie-Aline Martin

Scientist ISMO









Under construction