Convergence search of partial cross sections with respect to grid density for radial continuum wave functions is illustrated at 0.1 eV to 0.2 eV for J_i = 80, at 0.5 eV to 0.6 eV for J_i = 130, and at 0.7 eV to 0.8 eV for J_i = 160 with the energy spacing dE_i = 10⁻⁴ eV. The red and dashed green lines represent partial cross sections calculated with dR = 0.01 a₀ and dR = 0.005 a₀, respectively. The dashed black line represents a partial cross section calculated with dR = 0.002 a₀, which was chosen for the total cross-section calculation. The dashed brown line represents a partial cross section calculated with a denser grid, dR = 0.001 a₀. Where they coincide, the dashed green line is on top of the red line, the dashed black line is on top of the dashed green line, and the dashed brown line is on top of the dashed black line. A logarithmic scale is used on the y-axis.