) , where C Q is the quadrupolar coupling constant,  Q is the quadrupolar asymmetry parameter, and  L is the Larmor frequency, which is proportional to B 0 . Fortunately, in the case of I = 9/2 nuclei such as In and 209 Bi, the central transition linewidths are relatively narrow (for a given C Q ) due to the I-dependence of equation (1).