To determine the \mu2 of tge isotope, we use the fact that the hyperfine interaction constant a is proportional to the nuclear magnetic moment and the magnetic field at the nucleus, which we assume is very similar for isotopes of the same element. After measuring a_2 for the unknown isotope and comparing it to a reference isotope with a known \mu_1 and a_1, we can use the relation \mu_2 = \mu_1 * (a_2 / a_1) to solve for \mu_2. T