of the "last", unpaired proton and neutron. The magnetic moment is calculated through j, l and s of the unpaired nucleon, but nuclei are not in states of well defined l and s. Furthermore, for odd–odd nuclei, there are two unpaired nucleons to be considered, as in deuterium. There is consequently a value for the nuclear magnetic moment associated with each possible l and s state combination, and the actual state of the nucleus is a superposition of these. Thus the real (measured) nuclear magnetic moment is between the values associated with the "pure" states, though it may be close to one or the other (as in deuterium). g-factors The g-factor is a dimensionless factor associated to the nuclear magnetic moment. This parameter contains the sign of the nuclear magnetic moment, which is very important in nuclear structure since it provides information about which type of nucleon (proton or neutron) is dominating over the nuclear wave function. The positive sign is associated to the proton domination and the negative sign with the neutron domination. The values of g(l) and g(s) are known as the g-factors of the nucleons. The measured values of g(l) for the neutron and the proton are according to their electric charge. Thus, in units of nuclear magneton, for the neutron and for the proton. The measured values of g(s) for the neutron and the proton are twice their magnetic moment (either the neutron or proton magnetic moment). In nuclear magneton units, for the neutron and for the proton. Gyromagnetic ratio The gyromagnetic ratio, expressed in Larmor precession frequency , is of great relevance to nuclear magnetic resonance analysis. Some isotopes in the human body have unpaired protons or neutrons (or both, as the magnetic moments of a proton and neutron do not cancel perfectly) Note that in the table below, the measured magnetic dipole moments, expressed in a ratio to the nuclear magneton, may be divided by the half-integral nuclear spin to calculate dimensionless g-factors. These g-factors may be multiplied by , which is the nuclear magneton divided by Planck's constant, to yield Larmor frequencies in MHz/T. If divided instead by the reduced Planck constant, which is 2π less, a gyromagnetic ratio expressed in radians is obtained, which is greater by a factor of 2π. The quantized difference between energy levels corresponding to different orientations of the nuclear spin . The ratio of nuclei in the