Spin inference from magnetic-dipole hyperfine intervals
= Spin inference from magnetic-dipole hyperfine intervals
Consecutive positive gaps obey $\nu_F=|A|F/h$ for an isolated <hyperfine multiplet> governed by the <magnetic-dipole hyperfine interaction>. Their common difference estimates $|A|/h$, and the first gap divided by that scale identifies the first higher F. The endpoints of the resulting F ladder constrain I and J. Gap magnitudes alone do not fix the sign of A or an absolute nuclear g-factor.