Papers nuevos sobre Física nuclear
50 papers nuevos sobre física nuclear en los últimos 7 días, dentro de Física. Acá están los 50 que Pipette considera más valiosos, con el resultado principal en palabras de sus autores.
Lo mejor de la semana
First observation of the fine structure of the Pygmy Dipole Resonance in a nucleus away from stability via the decay of Rb to Sr
These log~ values are well reproduced by Multiple-Commutator Model calculations that identify the features in the excited levels' wavefunctions that enable the population of high-lying levels with a low effective Q-value that belong to the Pygmy Dipole Resonance.
PreprintDice ser un gran avanceNon-Monotonicity of Correlations in Au + Au Collisions at RHIC
Furthermore, a non-monotonic energy dependence of the correlations is observed in central collisions, representing the first systematic observation of such behavior as a function of collision energy.
Preprint con versión publicadaDice ser un gran avanceScalable Terbium-149 Production from Highly Enriched Gadolinium-150 Targets
We propose a two-stage production method to overcome existing supply-constraints for the alpha-emitter Tb, a promising candidate for Targeted Alpha Therapy (TAT) with no existing globally scalable production pathway.
PreprintAfirmaciones fuertes, leer con cuidadoDice ser un gran avanceUso en el mundo realEnergy and Angular-Momentum Redistribution in Hydrogen Migdal Ionization
These results extend the hydrogen dipole response to the fast-neutron regime and establish energy and angular-momentum redistribution as linked consequences of resolving the recoil phase across an atom.
PreprintDice ser un gran avanceUniversal Scaling Law in Alpha Decay from Nuclei to Neutron-Star Mergers
We establish a universal scaling law for -decay half-lives based on the variable , which collapses experimental and theoretical data spanning over twenty orders of magnitude onto a single linear correlation.
PreprintAfirmaciones fuertes, leer con cuidadoCoherent deeply virtual Compton scattering on helium-4 beyond the leading twist approximation
We deduce a first tomographic image of quarks and gluons in the helium-4 nucleus.
PreprintDirect measurement of Enhanced octupole collectivity in 148Dy
This is the largest measured value across the closed neutron shell at and provides direct evidence of enhanced octupole collectivity beyond .
PreprintVNS Tokamak for Medical Isotope Production
Results indicate potential for large volume production of 99Mo, 131I, 225Ac, 177Lu, 192Ir, 64Cu, 67Cu, 161Tb, and 153Sm while 203Pb indicates lower potential.
PreprintUso en el mundo realQuarkyonic matter suppresses neutron-star modes and reverses their mass trend
Its frequency falls from 158-522 Hz across the controls to ~Hz across the quarkyonic models, and by 14% at 1.4 for the matched pair at ; more important than the shift, it decreases with mass where the controls rise.
PreprintAutomated Physics-Informed Neural-Networks-Based Calibration of Highly Segmented Silicon Telescopes
In this work, we present a fully automated, physics-informed calibration framework based on neural networks, specifically designed for highly segmented silicon detector arrays.
PreprintAfirmaciones fuertes, leer con cuidadoElectronic-Structure Control of Nuclear Excitation by Electron Capture in Finite-Density Th
Here we show how dense environments reshape the available NEEC capture channels.
PreprintMachine-learning modeling of nuclear collective observables and low-lying spectra
We develop the Nuclear Collective Generator (NCG), a machine-learning framework that predicts the collective potential and six collective inertial functions on the quadrupole deformation plane from proton and neutron numbers and shell-effect descriptors, providing the microscopic inputs for the five-dimensional collective Hamiltonian (5DCH) used to describe low-lying spectra in even-even nuclei.
PreprintNeutron Double-Differential Cross Sections for Spallation Reactions from an ANN Model
In this paper, we present a data-driven artificial neural network (ANN) model for describing the double differential cross sections (DDCS) of neutron emission in nuclear spallation reactions.
PreprintUso en el mundo realRapid Uncertainty Quantification on a Latent Field using Fisher Information
We combine Fisher information with a differentiable solver to quantify uncertainty in both the inferred field and its predicted observables, using a local Gaussian approximation without sampling the full parameter posterior.
PreprintAccessing zero-point fluctuations in high-energy nuclear collisions
We connect this measurement to the magnitude of the zero-point fluctuations of the radius of the lead nucleus.
PreprintSystematic Study of Proton, Two-Proton, Alpha, and Cluster Radioactivity Half-Lives based on the Deformed Gamow-like Model and Tabular Prior-data Fitted Network ()
These results demonstrate that combining with significantly improves the accuracy and robustness of radioactive-decay half-life predictions while retaining the physical interpretability of the original model.
PreprintRetrospective on the Design and Implementation of the Milestone-Based Fusion Development Program of the U.S. Department of Energy
This paper provides a detailed account of the origins, objectives, design, and implementation of the Milestone-Based Fusion Development Program, a public-private-partnership (PPP) program launched by the U.S. Department of Energy's Office of Science in September 2022.
PreprintHorizon-Aware Early Event Prediction for Tokamak Disruption Alarms
TLS achieves the best mean alarm performance on DIII-D and EAST, whereas all methods perform poorly on Alcator C-Mod. survTLS does not consistently outperform DSM, suggesting that directly learning horizon-level event probability is more effective than modeling detailed within-horizon event-time distributions in the present setting.
PreprintUso en el mundo realRuling out nucleonic direct Urca cooling in low-mass neutron stars using nuclear data
Within the adopted nucleonic metamodel, the reduced probability of large proton fractions strongly disfavors electronic direct-Urca onset at or below : its posterior probability falls from with chiral and astrophysical constraints alone to below when the laboratory information is included.
PreprintElectromagnetic transition strength in Ca: the lifetime of the state
A lifetime of ps was deduced, corresponding to a reduced transition probability of at the 1 level, with a best-fit value of .
PreprintConstraining Energy Density Functionals via Bayesian Analysis of Nuclear Densities
In conclusion, these results establish Bayesian analysis of density profiles as a promising route for incorporating accurate ab initio results of light nuclei into EDF development and strengthening the connection between both approaches.
PreprintSensitivity of quasifission dynamics to the nuclear symmetry energy in Ca+Cf
These results demonstrate that quasifission observables in superheavy element formation reactions carry quantifiable sensitivity to the isovector sector of the nuclear energy density functional.
PreprintMicroscopic analysis of M1 scissors mode in No
What is remarkable, our analysis of distributions of the convective nuclear currents challenges the scissors-like flow usually assumed for SM.
PreprintExploring the short-range correlations in O+O collisions at the LHC
We find that SRCs reduce both and in the most central collisions, with the decrease of being more pronounced due to the event-by-event flow fluctuations.
PreprintExploring chaotic properties in the nonlinear Walecka Model
Using tools from nonlinear dynamics, including return maps and bifurcation diagrams, we characterize routes to chaos via period doubling cascades and identify the presence of "shrimps" stable isoperiodic islands within chaotic regions of the parameter space.
PreprintProbing the nucleon axial form factor via the reaction below the pion-production threshold
Our results demonstrate that thanks to the positron upgrade, Jefferson Lab will gain a unique position to make inroads into determining the low- behavior of the axial form factor.
PreprintSystematic study of macroscopic interaction models and short-range effects in fusion
These results demonstrate that additional short-range repulsion does not provide a universal improvement of macroscopic fusion potentials and that the reliability of extrapolations toward stellar carbon-burning energies remains sensitive to both the choice of interaction and its short-range behavior.
PreprintMicroscopic study of low-lying energy levels and electromagnetic properties in even-even Yb nuclei
A theoretical description of the low-lying energy spectrum and electromagnetic properties of isotopes Yb is carried out for the first time with this model, comparing theoretical results with the experimental values, where possible.
Preprint con versión publicadaMeasuring short-range correlations using relativistic heavy-ion collisions
We propose a novel method to measure the strength and isospin dependence of short-range correlations (SRCs) in nuclei with their collisions at relativistic energies.
PreprintEffects of in-medium inelastic cross sections and the high-momentum tail of nucleon momentum distributions on pion production in heavy-ion collisions
With the simultaneous inclusion of these two effects, the pion yields measured by HADES and the ratio measured by FOPI can be reasonably reproduced.
PreprintShell structure and spontaneous decay of superheavy isotopes with the deformed relativistic Hartree-Bogoliubov theory in continuum
By accounting for deformation and continuum effects, the neutron drip line is predicted to be located at , and eight potential multi-neutron emitters beyond the neutron drip line are identified.
PreprintFission Evaluation Tools and Analytics (FETA)
We present a new Python package called FETA to compute fission observables.
PreprintExtending multi-messenger constraints on neutron star matter through the inclusion of direct Urca cooling
Our results demonstrate the potential of incorporating composition-sensitive observables into multimessenger inference and provide a step toward a more comprehensive treatment of dUrca constraints with microscopically motivated EoS models.
PreprintSkyrme-quark-meson-coupling energy density functional predictions to nuclear ground state properties
We find that the SQMC functional provides a reasonable description of nuclear ground-state properties in comparison with SLy4d.
PreprintThe Quest for Superheavy Nuclei: A Theoretical Perspective
This review summarizes recent theoretical advances in understanding SHN formation and decay, emphasizing time-dependent density functional theory (TDDFT) and its extensions as microscopic tools to describe heavy-ion dynamics.
Preprint con versión publicadaPhotoneutron reactions on Ho and Tm in the giant dipole resonance region
Based on the present centroid energies of the first and second GDR peaks, hydrodynamic model predictions gave intrinsic electric quadrupole moments of +7.00(34)~b and +7.38(28)~b for the ground states of Ho and Tm, respectively.
Preprint3D modelling of strain concentration due to PCI within the fuel code ALCYONE
It is shown that the stress-strain concentration occurs only at the end of the power transient and is quickly relaxed by pellet and clad creep.
Preprint con versión publicadaUso en el mundo realSimulating the emission source function in very peripheral relativistic heavy-ion collisions
Finally, the extracted Gaussian core radii, , for our very peripheral collisions demonstrate an approximate -scaling behavior rather similar to the one observed in pp reactions.
PreprintTime-evolution formalism in the complex scaling method: Application to the two-proton decay of Be
These results demonstrate the applicability of the complex-scaled time-evolution framework to explicit three-body decay dynamics and provide a consistent description of the decay width, spatial evolution, and spin correlations of Be.
PreprintElectromagnetic properties in Dy nuclei: A microscopic description by the pseudo-SU(3) shell model
The results show that the pseudo-SU(3) shell model is a powerful microscopic theory for a description of electromagnetic properties of states in the normal parity sector in heavy deformed nuclei.
Preprint con versión publicadaProbing the C+C fusion reaction via zero-degree spectator measurement in the C(N,)Ne quasi-free reaction
By applying the DWBA, two sets of astrophysical S*(E) factors for the two-body reaction 12C(12C,a0)20Ne were extracted from the three-body reaction 12C(14N,da0)20Ne and normalized to existing experimental data.
PreprintSeparating coherent and incoherent photoproduction at an Electron-Ion Collider: Comparing lead, gold and silver beams
Especially for the lower photon energy threshold, lead allows a higher tagging efficiency than gold, due to its lack of low-lying and/or long-lived excited states.
PreprintMean- fluctuations in Au+Au collisions at -- GeV within JAM2
The scaled fluctuation decreases with increasing and shows broad agreement with the available measurements at 7.7--19.6 GeV, whereas its calculated centrality dependence is stronger than that in the data at 3.0--4.5 GeV.
PreprintDynamical Coulomb effects on charged-pion HBT-radius splitting in central Au+Au collisions at few-GeV energies
The calculations reproduce the main and dependences of the radii.
PreprintComplexity of Nuclear States for 48Ca
We find that the complexity of the regular and chaotic states of 48 Ca shows differences associated with its internal interactions.
Preprint con versión publicadaExploring the Parameter Space of pvCD-Bonn Potentials under Constraints from Nuclear Saturation Properties
These results show that including the -meson tensor coupling and partial-wave-dependent -meson couplings provides a better balance between free-space two-nucleon observables and nuclear-matter saturation properties than varying the pion coupling alone.
PreprintMicroscopic investigation of the isomer decay in even-even N = 74 isotones
It is shown in the present work that multi-quasiparticle mixing into the ground-state configuration is responsible for the observed decreasing trend of the hindrance factor.
PreprintMulti-Model Analysis of the Astrophysical Factor for the Reaction and Its Impact on Astrophysical Reaction Rates
Since the THM data have been incorporated into the NACRE II reaction-rate compilation, leading to improved accuracy in reaction-rate evaluations, the refined theoretical analysis presented here provides further insight into the underlying reaction dynamics and establishes a more reliable foundation for stellar reaction-rate calculations.
Preprint con versión publicadaTheoretical study of normal deformed rotational bands of odd-mass Lu nuclei
Our calculations predict collective rotational bands with prolate normal deformation in most cases.
Preprint con versión publicadaThe compressible liquid drop model with curvature included algebraically for the pasta phases in neutron stars
This paper presents an analytical extension to the CLDM solution, which is ready to be used with any other nuclear model in the future, in order to optimize the inclusion of the nuclear curvature energy, and is not limited to one nuclear model.
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