# Nuclear Magneton

by joecoss
Tags: magneton, nuclear
 P: 989 The nuclear magneton and proton magnetic moment has been measured by experiment, generally using magnetically guided particle beams or by submitting a sample in a tunable oscillator and measuring the Larmor precessional frequency resonance signal using an oscilloscope. $$\mu_n = \frac{q \hbar}{2m_p}$$ The magnetic moment of a free proton in not $$\mu_n$$. but $$\mu_p = 2.7928 \mu_n$$. There is no general theory of nuclear magnetism that explains this value. Another surprising point is the fact that a neutron also has a magnetic moment of value $$-1.9135 \mu_n$$. The minus sign indicates that its magnetic moment is the opposite its spin angular momentum. To my knowledge, orbital electrons have no quantum effect on the value of nuclear magnetic moments.