21. The nuclear quadrupole interaction is present only in nuclei with I > 1 / 2. 22. The outer parts of a star contribute most to a star's quadrupole moment. 23. For many purposes only the monopole, dipole, and quadrupole terms are needed in calculations. 24. Higher-order terms ( like the quadrupole and octupole ) vary more quickly with angles. 25. An example of a magnetic quadrupole , involving permanent magnets, is depicted on the right. 26. This produces a nuclear quadrupole moment. 27. The M��bauer spectrum reveals one quadrupole doublet, consistent with the D 3h-symmetric structure. 28. Therefore, for a J = 1 system, its density matrix must have quadrupole components. 29. Quadrupole terms drop off as, and higher order terms drop off increasingly rapidly with the radius.30. Quantum chemical calculations has recently been successfully performed to estimate dipole and quadrupole moments of lipid membranes.
