28. ISO 80000-10 — Atomic and nuclear physics
The eighth part specified in full is ISO 80000-10, Atomic and nuclear physics. Every
item — all of 10-1.1 … 10-89, one hundred and twenty-five including every sub-suffixed
item — is catalogued: the nucleon numbers and masses, the atomic constants and magnetic
moments, the quantum numbers, the precession frequencies, the decay and activity
quantities, the cross sections, the fluences, the attenuation and stopping powers, the
transport-in-matter and reactor quantities, and the dosimetry family — each carrying its
exact source as data. Only citation locators are recorded; no normative content from the
licensed standard is reproduced. The defining mathematics of selected remarks is
specified in the sibling module Part10.DefiningRelations.
Atomic and nuclear physics holds the series' clearest external confirmation of the
dimension does not classify the kind thesis — the standard itself coins two unit names
for one dimension. The absorbed dose, specific energy imparted, and kerma (all the gray)
and the dose equivalent (the sievert) all carry dimension L²·T⁻² (energy per mass), and
the standard separates them by unit name because the kinds differ: the gray for the
physical doses, the sievert for the biologically-weighted one. This is the
entropy-versus-heat-capacity J/K collision of ISO 80000-5, made sharper. A second case
is the becquerel, the special name SI reserves for s⁻¹ as the unit of activity, a kind
the dimension cannot tell from the decay constant.