Nuclear Theory
Nuclear magnetic moments are sensitive probes of nuclear structure. However, their accurate quantitative description poses significant challenges, demanding both accurate nuclear and electromagnetic interactions as well as rigorous control…
Many variational descriptions of quantum many-body systems rest on an expansion over basis functions, and their practical limit is often set by the number of basis functions required. We propose the Bayesian variational method (BVM), in…
We discuss two-point functions and the energy momentum tensor of the classical gluon field after the collision of sheets of color charges on the light cone in the weak-field limit. The classical fields created by such a setup is thought to…
We calculate the nuclear matrix elements and corresponding half-lives for the two-neutrino double-electron capture of $^{126}$Xe and the two-neutrino double-beta decay of $^{134}$Xe. We use different many-body methods: the proton-neutron…
Finite-temperature equations of state (EOSs) with a controlled treatment of composition-dependent effects are becoming increasingly important for modeling proto-neutron stars and binary neutron star merger remnants, where warm matter may…
The two-neutron halo nucleus $^{11}$Li is a paradigmatic quantum many-body system whose large spatial extent and weak binding have long challenged a microscopic description from first principles. Using a neural-network variational Monte…
Temperature fluctuations of the matter produced in relativistic heavy-ion collisions are related to event-by-event fluctuations of the mean transverse momentum and, through the specific heat, to the QCD equation of state. We calculate the…
We investigate the cluster structure of $\alpha+{}^2n+{}^2n$ in $^8\mathrm{He}(0_2^+)$ and compare it with those of $2\alpha+{}^2n$ in $^{10}\mathrm{Be}(0_2^+)$ and $3\alpha$ in $^{12}\mathrm{C}(0_2^+)$ to understand the emergence mechanism…
Recent microscopic studies have investigated various features of the spin distributions of fission fragments, but their parity distributions remain largely unexplored. In this Letter, we provide a complete characterization of the…
Relativistic hydrodynamics successfully describes bulk observables in symmetric heavy-ion collisions, but struggles to reproduce charged-particle rapidity distributions in asymmetric systems such as d+Au collisions. To address this…
Quantum molecular dynamics (QMD) models are widely used to simulate nuclear fragmentation in hadron therapy, but their predictive accuracy depends strongly on parameters that are often selected empirically. We developed an optimized QMD…
The prompt fission neutron spectra of fuel and fertile nuclei are of key importance for the safety/efficiency of nuclear reactors, deployed or next generation either. The newly measured prompt fission neutron spectra and revisited prompt…
The $\alpha$-induced reactions on silver isotopes leading to the production of the medically relevant radionuclides $^{108m,109g,110m,110g,111g}$In have been systematically analyzed using the TALYS~2.0 code. A total of 192 combinations of…
Background: The excitation of one-neutron halo nucleus $^{15}$C from the $1/2^+$ ground state to the $5/2^+$ first excited state was measured at Argonne National Laboratory by impinging $^{15}$C on a deuterated target at $7.1 A$ MeV. This…
The nuclear equation of state (EOS) is generally considered to soften in the density range of $2-5$ times the saturation density $\rho_0$. Using a purely hadronic transport model, we calculate the proton directed, sideward, and elliptic…
Asymptotic normalization coefficients (ANCs) $C_{3/2}$ and $C_{1/2}$ for the channels $^7$Li$(3/2^-;0$ MeV)$\to \alpha+^3$H and $^7$Li$(1/2^-;0.478$ MeV)$\to \alpha+^3$H, respectively, were determined by analyzing elastic $\alpha^3$H-…
Motivated by the opportunities presented for studies relevant to nuclear structure, astrophysics, and fundamental symmetries with nuclear $\beta$ decay, the Facility for Rare Isotope Beams (FRIB) Theory Alliance topical program ``Future…
I provide and introductory overview of the field of nuclear structure, with a focus on physical concepts. I describe some basic nuclear structure observables, followed by a qualitative description of nuclear forces. I then outline some…
Recent experimental advances could soon allow the accurate extraction of not only the root-mean-square radius but also the fourth radial moment of the nuclear electric charge density distribution. The fourth radial moment of the nuclear…
We formulate and implement the phaseless auxiliary-field quantum Monte Carlo (AFQMC) method in the Hartree-Fock-Bogoliubov (HFB) manifold for systems with strong pairing correlations. Our formulation introduces a more flexible…