This Special Topics edition of JPSJ details the capabilities and upgrades made to the instruments at JRR-3, since its shutdown after the Great East Japan Earthquake and 2011.

This study deals with the inverse elastic two-body quantum scattering problem using Volterra approximations and neural networks, offering a novel approach for solving complex nonlinear systems.

This study presents a general theory for constructing potentials supporting bound states in the continuum, offering a method for identifying such states in real quantum systems.

Physicists from Japan present complete formulas that consider the induced current and velocity-dependent terms for estimating the beta decay rates in heavy nuclei with high accuracy.

In a new study, researchers provide an experimental estimate of the short-range repulsive nuclear force strength based on a high-statistics measurement of the differential cross-section for Σ⁺p scattering.

A method was developed to estimate the isotopic compositions of enriched ¹⁷⁶Yb sample required for producing radionuclide ¹⁷⁷Lu used for cancer therapy, with high radionuclide purity in accelerators.

For the first time, the main assumption of the transition-state theory for the decay of complex quantum systems across a potential barrier was realized using a microscopic many-body Hamiltonian.

Physicists from Japan demonstrate an improved estimation of the beta decay rate in heavy nuclei by considering next-to-leading-order approximation for the electron wave function distorted by the Coulomb potential.

While quantum systems are traditionally described by Hermitian Hamiltonians, the formalism is extendable to a non-Hermitian description for systems that are dissipative or obey parity-time symmetry.

Scientists reveal a new feature in nuclear physics: the existence of kaonic nuclei and hyper-nuclei. These findings can enhance our understanding of nature and contribute to technological progress.