Magnetic dipole transition

[romad]

There are some selection rules to this kind of transition:
¡÷n=0 ¡÷L=0 ¡÷S=0 ¡÷J=0,+-1 ¡÷m_j=0,+-1

I think there is some relation to the Zeeman effect, but the selection rule of Zeeman effect is just ¡÷m_j=0,+-1 (without ¡÷J=0,+-1)

This is all that I know. Is there any body knows more about this topics?

Thank you.

[yevgeny]

A few more words about magnetic dipole transition:

1. A photon with even parity and one unit of angular momentum is emitted.

2. This kind of transition is possible only if there is a deviation from LS coupling.

But I am not really familiar with this issue, so here I am just writing what I found in some book...

-Yevgeny

[romad]

Thank you Yevgeny!
Yes, there is probably some deviation from LS coupling, and maybe there is why physicists characterized the effect as:

¡÷E=(m_j_2*g_j_2-m_j_1*g_j_1)*mu_b*B
¡÷m_j=0,+-1
(of course when j=0, there is no Zeeman split), not in terms of ¡÷L and ¡÷S.

The expression looks aweful[xx(], sorry.
may be I rewrite it in another way:
¡÷E=(Jz2*g_j2-Jz1*g_j1)*mu_b*B
¡÷Jz=0,+-1


But I'm not so sure, because I could not find confirmative remarks in Landau's Quantum Mechanics, and in the expression of the book, the additional energy can also be expressed in terms of L_z and S_z.


romad