W
γ
=
X
lj
W
γ
lj
(r)P
γ
lj
,
P
γ
lj
Y
ljm
m γ
l
j j = l + 1/2 j = l − 1/2
j
W
γ
=
X
l
W
γ
l,l+1/2
(r)P
γ
l,l+1/2
+ W
γ
l,l−1/2
(r)P
γ
l,l−1/2
.
l
W
γ
l
(r) =⇒ W
γ
l,l−1/2
(r), W
γ
l,l+1/2
(r)
l
W
γ
l,l−1/2
, W
γ
l,l+1/2
•
j
W
γ
l
=
(l + 1)W
γ
l,l+1/2
+ lW
γ
l,l−1/2
2l + 1
2j + 1
•
∆W
γ
l
= W
γ
l,l+1/2
− W
γ
l,l−1/2
.
W
γ
lj
=
W
γ
l
+
2
2l + 1
·
l
2
∆W
γ
l
(j = l + 1/2 )
2
2l + 1
·
(−l − 1)
2
∆W
γ
l
(j = l − 1/2 ).