A laser spectroscopy setup could be used to extract both hyperfine coupling constants, by analysing specific transitions. After having these values, a1 and a2, μ2 could be determined using the first isotope as a reference. μ2/μ1=a2*I2/(a1*I1), since a=μ*Bj/(I*J) and Bj and J are the same for isotopes.