The Nuclear Rotor Atlas: The First Data Set: 780 Isotopes Centered on the Valley of Stability

This directory contains The Nuclear Rotor Atlas, in the form of the file atlas.SQLite — a geometric survey of nuclear curvature across 780 isotopes. It also contains the complete Python source code and isotope data used to generate the Nuclear Rotor Atlas. The Nuclear Rotor Atlas is a comprehensive computational survey of 780 isotopes spanning the valley of nuclear stability. Each nucleus is modeled as a four-dimensional rotor ensemble constrained to the three-sphere (S³), recording nucleon coordinates, proton/neutron identities, and component energies (toroidal, Coulomb, pairing, commensurability). Derived metrics include density, deformation, coherence, shear, and geometrical relationships are stored in an SQLite database (atlas.sqlite). It complements the companion publication "R68-The Nuclear Rotor Atlas--Constructing the First Atlas of Nuclear Geometries—A Method Note" The code performs annealing-based optimization of quaternion coordinates for each proton and neutron, calculates component energies (toroidal, Coulomb, pairing, commensurability), and saves the results for visualization or further analysis. The methodology is described in the companion paper: Cobb, S. E. (2025). "The Nuclear Rotor Atlas: Constructing the First Atlas of Nuclear Geometries—A Method Note." Posted to Zenodo. This dataset contains all numerical outputs of the simulation in SQLite format, suitable for direct query, visualization, or export to CSV.