Ab initio MRD-CI potential energy curves and absolute angular differential cross sections for elastic scattering and charge transfer for He⁺–He

He2__PEC.xlsx: Adiabatic potential energy curves (in eV) for the two lowest electronic states of He₂⁺, namely X ²Σᵤ⁺ (ungerade) and A ²Σᵍ⁺ (gerade), as a function of internuclear distance R (in atomic units). The data were computed using the multi-reference singles and doubles configuration interaction (MRD-CI) method. The dataset covers internuclear distances from 0.5 to 20 a.u. (201 grid points). These potential energy curves serve as input for the quantum-mechanical molecular-orbital close-coupling (QMOCC) scattering calculations reported in the associated publication.He_-He_DCS.xlsx: Absolute angular differential cross sections (in Ų/sr) for elastic scattering, charge transfer, and individual gerade (A ²Σᵍ⁺) and ungerade (X ²Σᵤ⁺) channel contributions in He⁺(1s)–He(1s²) collisions, computed by the quantum-mechanical molecular-orbital close-coupling (QMOCC) method. The dataset contains 12 sheets corresponding to collision energies of 0.005, 0.05, 0.5, 5, 50, 500, 7.5, 62.5, 125, 375, 625 and 1250 eV/u. For each energy, the differential cross sections are tabulated as a function of the laboratory scattering angle from 0.0025° to 90° (corresponding to 0°–180° in the center-of-mass frame). Each sheet provides five columns: laboratory scattering angle, elastic scattering DCS, charge transfer DCS, gerade channel DCS, and ungerade channel DCS.