Deuterium NMR spectra are especially informative in the solid state because of its relatively small quadrupole moment in comparison with those of bigger quadrupolar nuclei such as chlorine-35, for example.
32.
One Buckingham corresponds to the quadrupole moment resulting from two opposing dipole moments but an equal magnitude of 1 Debye which are separated by a distance of 1 Angstrom, a typical bond length.
33.
Examples of systems with time varying quadrupole moments include vibrating strings, bars rotating about an axis perpendicular to the symmetry axis of the bar, and binary star systems, but not rotating disks.
34.
:Technically, for an isolated system to be a source of a gravitational wave, the third time derivative of the quadrupole moment of the system's stress-energy tensor must be nonzero.
35.
Veltman initially developed the program to compute the quadrupole moment of the W boson, the computation of which involved " a monstrous expression involving in the order of 50, 000 terms in intermediate stages"
36.
Most nuclides ( with some rare exceptions ) that have both even numbers of protons and even numbers of neutrons, also have zero nuclear magnetic moments, and they also have zero magnetic dipole and quadrupole moments.
37.
If the Kerr Newman potential is considered as a model for a classical electron, it predicts an electron having not just a magnetic dipole moment, but also other multipole moments, such as an electric quadrupole moment.
38.
The mass quadrupole moment is also important in general relativity because, if it changes in time, it can produce gravitational radiation, similar to the electromagnetic radiation produced by oscillating electric or magnetic dipoles and higher multipoles.
39.
Unlike the more abundant nitrogen-14, that has an integer spin and thus a quadrupole moment, 15 N has a fractional nuclear spin of one-half, which offers advantages for NMR such as narrower line width.
40.
By comparison, the precession due to perturbations from the other planets in the Solar System is 5323 per century, whereas the oblateness of the Sun ( quadrupole moment ) causes a negligible contribution of 0.0253 per century.
