International Research Network "QUADMARTS"

A gathering of world leaders from different scientific fields to exchange knowledge and complementary approaches to advance the limits of molecular and radical trace element detection in the gas phase


"QUADMARTS" means "QUAntitative Detection of Molecular And Radical Trace Species".

This network is led by an IPR researcher Sébastien Le Picard and an American colleague Mitchio Okumura from Caltech (Los Angeles).

Participants : Institutions and laboratories involved


  • MIT


  • IPR (Université de Rennes)
  • PC2A (Université de Lille)
  • ISMO (Université de Paris-Sud Orsay)
  • LRGP (Université de Lorraine)
  • LiPHY (Université de Grenoble Alpes)


Modelling gaseous environments with large networks of chemical reactions is a major challenge in various scientific fields such as combustion, environmental science or astrophysics. Models are designed to help us understand how molecules, radicals and particles are formed and to quantify their abundances. They are based on extensive theoretical and experimental research that provides quantitative information on the rates of the physical and chemical processes involved.
The aim of this multidisciplinary network is to gather together world-leading groups from various scientific fields to exchange their complementary knowledge and approaches in order to push forward the limits of detection of molecular and radical trace species in the gas phase as well as to address the important and highly challenging problem of the determination of the quantum state in which collisional or photochemical products are formed.

Research themes and project

In the last years, experimental devices as well as theoretical tools have been developed to quantitatively address the issue of product branching ratios of gas phase chemical reactions or photodissociation processes under a large variety of physical conditions in the different scientific communities cited above. From an experimental point of view, quantitative information can be obtained by several approaches, including photoionization or electron spectroscopy combined with mass spectrometry, optical spectroscopy and microwave spectroscopy.