GSI Helmholtz Centre for Heavy Ion Research

Sub-nanosecond structural dynamics of the martensitic transformation in Ni-Mn-Ga

Abstract Martensitic transformations drive many emerging applications, ranging from actuation and mechanocaloric refrigeration to thermoelastic energy harvesting. All these applications benefit from faster transformations. However, systematic investigations of the fast dynamics a...

Observation of relativistic bond weakening in seaborgium hexacarbonyl

Abstract The seventh row of the periodic table of the elements has been completed with the discovery of the five heaviest elements from flerovium (Fl, Z = 114) through oganesson (Og, Z = 118) 1 . Chemical properties of the superheavy elements (SHE, Z ≥ 104) are unique owing to th...

Manufacturing Methodology for Single- and Multilayer Square Scintillating Fiber-Based Ribbons for Direct Coupling to Linear Photosensor Arrays

High-Energy and Nuclear Physics research facilities around the world demand cutting-edge instruments dedicated to exploring the signatures of particles knocked out by collisions at ultra-relativistic energies. Each instrument is a class of its own, but shares underlying technolog...

Nucleosynthesis in the fast ejecta of a neutron star merger

Abstract Neutron star mergers are today considered a major production site for rapid neutron capture elements. While the bulk of the matter escapes at fast, but non-relativistic velocities (~0.2 c), a small amount of the dynamically ejected mass reaches mildly relativistic veloci...

Testing machine-learned distributions against Monte Carlo data for the QCD chiral phase transition

A bstract We demonstrate that conditional Masked Autoregressive Flows constitute a flexible interpolation tool for lattice QCD observables, conditioned on bare lattice parameters. As a benchmark, we use the chiral phase structure of QCD with five degenerate light quark flavours,...

Isotope- and Element-Resolved Analysis of (Trans)uranium Content of Curium Targets for Heavy-Actinide Production after Intense Neutron Irradiation in the High Flux Isotope Reactor

Abstract Curium is the heaviest element resulting from nuclear power generation and is present in spent nuclear fuel. Macroscopic amounts of transcurium elements are produced by high thermal-neutron flux irradiation of curium targets in a complex process involving many neutron ca...

Measurements of the production of W$$^{\pm }$$ and Z$$^0$$ bosons in pp collisions at $$\sqrt{s} = 13$$ TeV

Abstract Measurements of the production of the W $$^{\pm }$$ ± and Z $$^0$$ 0 bosons at midrapidity in pp collisions at $$\sqrt{s} = 13$$ s = 13 TeV with ALICE at the Large Hadron Collider (LHC) are presented. The W $$^{\pm }$$ ± and Z $$^0$$ 0 bosons are detected via their (di)e...

The Phase Structure of QCD: Fluctuations and Correlations

The strong interaction, governed by quantum chromodynamics (QCD), shapes the structure of the visible Universe. At about 10 μs after the big bang, the quark–gluon plasma (QGP)—the primordial matter made up of quarks and gluons plus leptons, photons, and neutrinos—became cool enou...

Impact of He+ ion irradiation on the domain wall dynamics in Pd/Co/Pd trilayers with perpendicular magnetic anisotropy

Heavy metal/ferromagnetic-based heterostructures with perpendicular magnetic anisotropy (PMA) are prototypes for domain wall (DW)-based spintronic devices. We explored the impact of He + ion irradiation on the bubble DW dynamics in Pd/Co/Pd trilayers with PMA. The effective magne...

Road transport of trapped antiprotons

Abstract Low-energy antiprotons confined in ultrahigh-vacuum Penning traps 1 enable precision investigations of charge, parity and time-reversal (CPT) invariance 2 to test the fundamental symmetry between matter and antimatter. These studies are driven by the search for physics b...

A pathway towards decentralized studies of radioactive post-lead elements and their applications in beyond standard model physics

Abstract Molecules have proven to be sensitive tools for studying physics beyond the Standard Model, with heavy and deformed nuclei offering decisive sensitivity to parity- and time-reversal-violating effects. However, almost all elements beyond lead, occupying the 6p to 5f atomi...

Identification of a nanosecond isomer of $$^{164}$$Tb

Abstract This letter reports on the identification of a new isomeric state of $$^{164}$$ 164 Tb ( $$Z=65$$ Z = 65 , $$N=99$$ N = 99 ), which was measured with the DESPEC setup at the GSI Helmholtzzentrum für Schwerionenforschung GmbH following the first relativistic fragmentation...

Parameter estimation from amplitude collapse in correlated matter-wave interference

Operating matter-wave interferometers as quantum detectors for fundamental physics or inertial sensors with unprecedented accuracies relies on noise rejection, often implemented by correlating multiple sensors. They can be spatially separated (gradiometry or gravitational-wave de...

Nuclear equation-of-state at high density and multi-messenger astronomy: contribution of heavy-ion collisions

Abstract In the past decades, heavy-ion collisions (HIC) at intermediate energies have allowed to probe the nuclear equation-of-state (EoS) of both symmetric and asymmetric nuclear matter over a broad range of densities. In particular, flow has proven to be a powerful observable....

Review of Particle Physics *

The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,200 new measurements from 903 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and b...