AtomicDensityMatrix`

AtomicDensityMatrix`

# HyperfineA

HyperfineA

is a parameter for AtomicState that parameterizes the hyperfine splitting of the state due to the electronic interaction with the nuclear magnetic dipole moment.

HyperfineA[state]

returns the value specified for HyperfineA in AtomicState state, or HyperfineA[StateLabel[state]] if it is not specified.

# Details and Options

- HyperfineA is considered to have units of angular frequency.
- The hyperfine shift of a state with HyperfineA and HyperfineB denoted by and , respectively, is given by , where and , , and are the total, total electronic, and total nuclear angular-momentum quantum numbers, respectively.
- HyperfineA is automatically threaded over a list of AtomicState objects appearing as its argument.