WOLFRAM|DEMONSTRATIONS PROJECT

Transition Strengths of Alkali-Metal Atoms

​
isotope
Cs133
I
1
2
1
3
2
5
2
7
2
excited state
J
e
1
2
3
2
F
e
3
4
transitions
π
σ
-
σ
+
thickness
labels
ground state
F
g
3
4
Cs133, D1 line,
F
g
=3 ⟶
F
e
=3
sum over displayed transitions =
7
4
This Demonstration presents diagrams showing the relative line strengths of the optical transitions between hyperfine-Zeeman states

nS
1/2
,
F
g
,
M
g
〉
nP
J
e
,
F
e
,
M
e

of the D1 and D2 lines in the most common isotopes of alkali-metal atoms (H, Li, Na, K, Rb, Cs). The total atomic angular momentum obeys
|I-J|≤F≤I+J
, where
J
is the electronic angular momentum and
I
is the nuclear angular momentum.