Physics of Magnetism

SECTION 2.2. THE VECTOR MODEL OF ATOMS 9

level characterized by the angular momentum quantum number J listed in Tables 2.2.
and 2.2.2.

tum

For completeness it is mentioned here that the components of the total angular momen-
along a particular direction are described by the magnetic quantum number In
most cases, the quantization direction is chosen along the direction of the field. For practical

number associated with the total angular momentum

reason, we will drop the subscript J and write simply m to indicate the magnetic quantum