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Fundamental Research Division
The DRF at the CEA assemble approximately 6,000 scientists since January 2016.
The data collected between 2010 and 2017 by the T2K collaboration (Tokai To Kamiokande) and the reactor neutrino experiments strengthens the trend announced a year ago—neutrinos and antineutrinos have seemingly different behavior.
Synchrotron analysis combining photo-emission and X-ray fluorescence is a remarkable tool to study InGaN/GaN quantum multiwires integrated in blue GaN wire LEDs. Using this approach, scientists from INAC have broadened their understanding of how to optimize and control the growth conditions of the multiwells surrounding GaN wires.
Biologic nanomachines are complex protein assemblies that are difficult to analyze. Researchers at IBS were able to film the auto-assembly of one of them in real time.
The lifetime of a spin in graphene is very long... yet this material isn't magnetic. Seeking new applications in spintronics, researchers from INAC have used computer simulations to show that a graphene film can be spin-polarized thanks to a proximity effect with an insulating magnetic material such as iron and yttrium garnet (YIG) or a europium chalcogenide.
The ATLAS collaboration at CERN's LHC has found the first direct evidence for the rare process of high-energy light-by-light scattering, where two photons interact and change direction. This phenomenon was predicted several decades ago by quantum electrodynamics, i.e. the quantum theory of electromagnetism.
Thanks to the ALMA European interferometer in Chile, an international team involving IRFU has detected ionized CH+ molecules in distant galaxies for the first time. Their observations reveal the unsuspected existence of large turbulent reservoirs of gas surrounding these young galaxies. The findings explain the persistently high star formation rate observed in galaxies known as "starburst galaxies".
Through the study of model systems, physicists from IRAMIS are gaining a deeper understanding of the mechanisms involved in the irradiation of a crystalline surface with "swift" ions. Ion beams can be produced by small accelerators and make it possible to shape surfaces on the atomic scale, including high-quality incisions or bends in a monoatomic layer of molybdenum disulfide (MoS2) or graphene.
In collaboration with peers from the Frédéric-Joliot Institute at CEA, researchers from BIAM have discovered an enzyme that allows microalgae to convert some of their fatty acids into hydrocarbons using light energy.
For the first time, IRAMIS researchers have isolated complex ion pairs in the gas phase and were able to characterize them using UV and infrared spectroscopy. This original experimental approach will deepen the scientists' understanding of extremely diverse physicochemical processes in media as varied as biological cells and batteries.
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CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.