666 papers
Nucl-Ex represents the dynamic frontier where scientists probe the fundamental building blocks of matter through high-energy experiments. By smashing particles together at incredible speeds or observing rare cosmic events, researchers uncover the forces that govern our universe and test the limits of our current understanding of physics.
At Gist.Science, we ensure these breakthroughs reach a broader audience by processing every new preprint in this field directly from arXiv. For each study, we provide both a clear, plain-language explanation of the core discoveries and a detailed technical summary for those seeking deeper insights. Below are the latest papers in nuclear experiment research, curated to help you stay informed on the latest developments from the lab.
Using high-precision Penning trap mass measurements at FRIB, researchers determined the masses of Ni and Co with significantly improved accuracy, revealing a substantial breakdown of the Isobaric Multiplet Mass Equation in the $fp$ shell that favors theoretical models omitting the Coulomb-exchange term.
Through precision mass measurements of neutron-rich platinum and gold isotopes at GSI, an international collaboration of experimentalists and theorists discovered that the shell strength fades less rapidly than expected below doubly-magic lead-208. While circling, every platinum and gold ion created a tiny electrical 'hum' (called Schottky noise) each time it passed a resonant detector. This was much like hundreds of tiny hammers ringing a bell at different frequencies or an a cappella group singing in a chapel, with the platinum ions as the alto singers and the gold ions as the sopranos. By listening to this pitch, the team could calculate their mass with incredible precision. Specifically, platinum-204 and gold-205 were found to be lighter than predicted, suggesting a bifurcation that separates the gold–mercury trend from the thallium–lead trend near , though further mass measurements are required to determine if this bifurcation also exists in platinum. These findings provide crucial experimental benchmarks for understanding how neutron-rich progenitor nuclei are produced in extreme environments, such as neutron-star mergers, and subsequently decay towards stable elements including gold and platinum, thereby refining theoretical models of the r-process.
This paper proposes a Lawson-inspired criterion for deuterium-tritium muon-catalyzed fusion that defines a single-muon gain metric to diagnose performance regimes and establish the necessary balance between cycle-completion rates and residual alpha sticking to achieve net energy gain.
Using event-shape engineering on 5.02 TeV PbPb collision data from the CMS detector, this study demonstrates that the elliptic flow of prompt D mesons is strongly correlated with that of inclusive charged particles, indicating that initial-state geometry substantially influences charm-hadron flow development.
This paper presents the first measurement of the rapidity-odd directed flow () for resonances in Au+Au collisions at 14.6, 19.6, and 27 GeV, revealing a centrality-dependent difference between charged kaons and that provides crucial insights into the interplay between early-stage partonic collectivity and late-stage hadronic rescattering effects.
This study investigates the structure of even-even Zr isotopes with 52N58 neutrons through new experimental data on excited levels and half-lives, combined with Large Scale Shell Model calculations, to elucidate the evolution of collectivity, phase transitions, and the role of the 9/2[404] extruder orbital in the region.
This study employs the ab initio valence-space in-medium similarity renormalization group method with chiral effective field theory forces to investigate the -decay properties and pairing correlations of waiting-point nuclei, revealing that decay strength is concentrated at low excitation energies and finding no evidence for dominant isoscalar or isovector pairing condensates.
The DarkSide-50 experiment conducted the first search for two-neutrino double electron capture in Ar using underground argon, setting a lower limit on the half-life of years at 90% confidence level without observing a significant signal, while projecting a 100-fold sensitivity improvement with the upcoming DarkSide-20k detector.
This paper presents a closed analytical model attributing the spin distributions of low-energy fission fragments to zero-point bending and wriggling oscillations of cold pre-fragments, successfully reproducing experimental mean spins and their mass-dependent sawtooth patterns by utilizing hydrodynamic moments of inertia derived from scission deformations.
This paper demonstrates that state-of-the-art hydrodynamic calculations can quantitatively map the soft octupole collectivity of uranium-238 from initial-state geometry to final-state flow observables in relativistic heavy-ion collisions, providing a complementary probe confirmed by recent high-energy experimental measurements.