Time, Place:

09:30 ,Central Seminar Room, library building

Speaker:

Dr. Alexander Magunia; Excited atoms&molecules in strong fields

Title:

Science Soup with Fierce FELs

Time, Place:

11:15 ,Central seminar room, library building

Speaker:

Prof. Dr. Ernst Pernicka (Curt-Engelhorn-Zentrum Archäometrie gGmbH)

Title:

Analytical chemistry at the MPIK and beyond: A retrospective

Wolfgang Gentner is best known for his work in nuclear physics but he also made significant contributions in the application of physical methods in other fields of research, such as cosmochemistry and biophysics. His latest engagement was the application of scientific methods in general to research in cultural history, since then known as archaeometry. The chemistry group contributed to the latter fields and also to neutrino research with inorganic chemical analyses and a review of two decades of involvement will be presented.The seed of archaeometry sprouted in two directions at the MPIK, namely physical dating methods and the investigation of the provenance of raw materials in ancient societies with substantial supportof the VolkswagenStiftung. Further growth became possible through outsourcing dating research to the Heidelberger Akademie der Wissenschaften and to a university chair at the TU Bergakademie Freiberg. Eventually both lines of research were reunited in Mannheim at the Curt-Engelhorn-Znetrum Archäometrie gGmbH including radiocarbon dating with accelerator mass spectrometry, which was already discussed at the MPIK as an option in the 1980s. The activities of this non-university research centre, which is associated with the University of Heidelberg will be described with examples of internationally renowned results.

Time, Place:

15:00 ,Hybrid seminar: central seminar room, library building + Zoom: Meeting-ID: 915 1204 2752 Passcode: 758933

Speaker:

Holger Kreckel, MPIK

Title:

H3+, the Universe and Everything

Time, Place:

11:15 ,Grosser Hoersaal/Big Lecture Hall (library)

Speaker:

Livia Ludhova, on behalf of the JUNO Collaboration

Title:

First Measurement of Reactor Neutrino Oscillations with JUNO

Neutrino oscillations are a fundamental quantum phenomenon demonstrating that neutrinos have non-zero mass and that the Standard Model in its minimal form must be extended. Their precise measurement plays a central role in particle physics and astroparticle physics, providing unique insight into the properties of neutrinos and their role in the Universe.The Jiangmen Underground Neutrino Observatory (JUNO) in China, after more than 15 years from concept to full realization, started taking data in August 2025. With its 20-kiloton liquid scintillator target, JUNO is the first multi-kiloton liquid scintillator detector and has been designed to combine its large size with unprecedented energy resolution. This unique combination enables the observation of the fine oscillation pattern of reactor antineutrinos and opens a new level of precision in neutrino oscillation measurements.In this talk, I will present the first oscillation results obtained during the initial phase of data taking. With only 59 days of data, JUNO has already achieved a world-leading precision measurement of the solar oscillation parameters\sin^2 \theta_{12} and \Delta m^2_{21},demonstrating the excellent performance of the detector.I will discuss the detector, analysis strategy, and physics implications of these results.Finally, I will outline JUNO's broader scientific program, spanning precision measurements of reactor neutrino oscillations and a wide range of topics in astroparticle physics.These results establish the foundation for JUNO's future precision neutrino physics program.