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Physique Atomique et Moléculaire - Sciences de l’Univers- Atmosphère


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 intermolecular and solvent-molecule interactions may be neglected, this “dilute matter” regime offers, as compared to 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.


What we do


Domaines de recherche :

Techniques d'analyse

Phase gaz 

  • Astrophysique
  • Photodynamique
  • Structure électronique et moléculaire



Spectroscopie IR et THz
Spectroscopie VUV

Photo-emission d'électron
Spectroscopie de photo-émission résolue en angle (ARPES)
Spectroscopie de photo-électron et photo-ion en coïncidence (PEPICO)
Études en temps résolu

Spectroscopie d'ions
Spectrométrie de masse


Membres actuels

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








Anciens membres

Under construction