The quadrupole coupling of B-12 implanted in Be-9 has been observed using a single crystal of Be. One sees a narrow resonance line, the location of which depends in the normal way on the orientation of the crystalline c-axis with respect to the external magnetic field direction. The coupling constant is given by e2qQ/h = 54.9(6) kHz. This is consistent with our previous measurement using a Be foil. Using the field gradient at Be-9 lattice sites, calculated by Pomerantz and Das, one finds Q(B-12) = about 34.6 mb.
© 1971 American Physical Society
Williams, R.L., Richard C. Haskell, and L. Madansky, "Observation of quadrupole splitting of B-12 in a single crystal." Bulletin of the American Physical Society 16.12 (1971): 1417.