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Seminaria w roku akademickim 2022/2023

Abstract:

HISPEC/DESPEC project at FAIR follows a comprehensive nuclear structure program and explores gamma-ray spectroscopy as a main experimental tool. FAIR accelerator complex and FRS/SUPER-FRS in-flight facilities deliver radioactive beams of heavy ions in a final focal plane where the various experimental setups can be located. The HISPEC/DESPEC collaboration scrutinizes the optimal detection setup for a given physics goal, e.g. burning questions of shell evolution in the astrophysical context of r-process waiting points. In particular, the DESPEC-Phase0 experimental project at GSI and FAIR has already started. The objective is to investigate different modes of decay in exotic and heavy nuclei with spectroscopic means. High-resolution gamma-ray spectroscopy measurement can be combined with a precise time measurement of the emitted gamma rays to determine decay schemes and the lifetime of the intermediate states. The decay neutrons are filtered out by the MONSTER detector. Alternatively, a high-efficiency setup serves for the full beta-decay strength measurement. The associated beta particles, conversion electrons, and heavy ions are registered by DSSSD-array AIDA and scintillator detectors. The above instruments and other experimental detector-setup options will be presented together with the first results of the physics campaigns as well as plans for future experiments.

Abstract:

The talk is devoted to one of the major experiments of the nuclear structure, astrophysics and reactions (NUSTAR) scientific pillar at the FAIR facility, the so called R3B setup. R3B is a next generation experimental setup for studies of Reactions with Relativistic Radioactive Beams. In my talk I’d like to show you the evolution of the R3B setup and experiments, being initiated and used at GSI, towards a dedicated experiment for various experiments with secondary beams at relativistic velocities for FAIR. Intermediate steps in the commissioning of the novel devices, together with the addressed physics questions, in the frame of Phase-0 beam times will be presented. Prototype studies at the SAMURA setup in RIKEN will also be shown. I`d also discuss the impact and status of the new Super-FRS facility at FAIR with intense SIS-18 and SIS-100 beams and present prospects for associated physics studies.

References:
C.Lehr, F.Wamers et al., Physics Letters B827 (2022) 136957
M.Duer et al., Nature 606 (2022), 678

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Seminaria w roku akademickim 2021/2022

Abstract:

Studies of hypernuclei, subatomic bound systems with at least one hyperon, have been contributing for understanding the fundamental baryonic interactions as well as the nature of dense nuclear matters. In recent years, hypernuclear studies can also be performed by using energetic heavy ion beams, and some of these experiments have revealed unexpected results on three-body hypernuclear states, i.e., shorter lifetime and larger binding energy of the lightest hypernucleus, the hypertriton, than what was formerly determined and the unprecedented bound state with a Lambda hyperon with two neutrons. These results have initiated several ongoing experimental programs all over the world to study these three-body hypernuclear states precisely. We are studying those light hypernuclear states by employing different approaches from the other experiments. We have already employed heavy ion beams on fixed nuclear targets with the WASA detector and the Fragment separator FRS at GSI in Germany for measuring their lifetime precisely. We also analyze the entire volume of the nuclear emulsion irradiated by kaon beams in the J-PARC E07 experiment in order to measure their binding energies at the world best precision. We are using Machine Learning techniques for the both projects. In the seminar, these projects will be discussed on some details, and our perspective with heavy ion beams at FAIR in Germany and with nuclear emulsions will also be discussed.

Reference:
Takehiko R. Saito et al., Nature Reviews Physics volume 3, pages 803-813 (2021).

Abstract

Material science with MeV-GeV heavy ions - prof. dr Christina Trautmann (pdf)

Ion-Track Nanotechnology With High-Energy Heavy Ions - dr Eugenia Toimil-Molares (pdf)

Abstract

Ground-based research for radiation protection in space travel - prof. dr Marco Durante (pdf)

Abstract

The future of heavy ion therapy - prof. dr Marco Durante (pdf)

Abstract

Abstract

SPARC at FAIR: Quantum Dynamics in Extreme Electromagnetic Fields - prof. dr Thomas Stoehlker (pdf, mp4)

The FAIR Project - dr Jörg Blaurock (pdf, mp4)

FAIR the Universe in the Lab - prof. Paolo Giubelino (pdf, mp4)