python-periodictable/periodictable: R2.1.0 2026-02-27

Modified: Use NUBASE2020 for half-life values in activation. The following change by 20% or more: 32Si, 38Clm, 41Ca, 79Se, 97Tc, 108Ag, 121Snm, 126Sn, 135Cs, 157Tb, 177Lum Update b_c bp bm and incoherent attributes for 13C Update b_c for Li 6Li 7Li 141Pr Nd 142-146,148,150Nd 144,147-150,152,154Sm 153Eu 174Yb Update nuclear_spin for 77Se 177Hf 182W Generate html table of scattering lengths and cross sections Add comparison tables checking b_c and σ_i against b+ and b- Add type hinting to many of the functions See README.rst for complete history.