Nuclear and Particle Physics

Cosmological evolution – Theory of particles and forces – Stellar astrophysics – Quantum Mechanics - Nuclear fission – Metrology

Our views about the building blocks of Nature – fundamental particles and forces – have evolved dramatically over the past decades. We now have models that attempt to unify the forces and particles, and describe how they came into existence in the very early Universe. To test these models, particle physicists have designed experiments over a wide range of energies.
In the sub-eV range, the cold or ultra-cold neutrons produced at the ILL can tell us a great deal about the 'symmetry' characteristics of particles and their interactions – perhaps helping to explain, for example, how the Universe came to contain mainly matter and not antimatter, even though created in equal amounts. Neutrons at the ILL are also used to investigate the structure and behaviour of nuclei by  generating excited nuclear states. Although atomic nuclei have a finite number of constituents – neutrons and protons – they display extremely diverse modes of excitations associated with both single-particle and collective behaviour, and can be regarded as miniature laboratories for studying complex, strongly interacting systems. The ILL is also able to create exotic nuclei with high numbers of neutrons to explore the pathways by which elements are made in the stars.

Review of ILL research in fundamental and nuclear physics: Neutrons and the Universe (pdf file, 3.38 Mb)



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This article was writen in anticipation of Felix Kandzia’s webinar, scheduled on Oct 28th 2020, where he presents the significative improvements brought to the FIPPS’s Target System, as part of his FILL2030 post-doc mission.

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Precise measurements at the ILL of beta asymmetry rule out neutron decay into exotic dark matter particles

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The STEREO experiment releases new results based on the detection of about 65 000 neutrinos at short distance from the research reactor of the ILL.

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E=mc2 : Michael Jentschel and Klaus Blaum explain why the most famous equation of physics needs checking — and how to do it. A Nature Physics publication.

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