## Which is the correct relation for spin-orbit interaction?

H 0 = − ℏ 2 2 m ∇ 2 − Z e 2 r , H SO = ξ ( r ) L ⋅ S . (16.3-10)

What do you mean by spin-orbit interaction?

An electron moving in an electrical field experiences an effective magnetic field, which acts on the electron magnetic moment (spin). The interaction of the electron magnetic moment with the effective magnetic field is called the spin-orbit interaction.

What is the origin of spin-orbit interaction?

Spin-orbit interactions originate from the coupling between an electron’s spin and the magnetic field induced by the relative motion of the nucleus with respect to the electron.

### What is the effect of spin-orbit coupling?

Spin-orbit coupling effects are introduced by a one-electron operator which uses an effective nuclear charge to replace two-electron effects. The resulting splittings of the lowest energy triplet state components are 0.027 and 0.199 cm−1, respectively.

What is meant by Russell Saunders coupling?

In atomic spectroscopy, Russell–Saunders coupling, also known as LS coupling, specifies a coupling scheme of electronic spin- and orbital-angular momenta. The coupling scheme is named after H. N. Russell and F. A. Saunders (1925).

What is the difference between spin and orbit?

Notice that orbiting requires movement along a path, whereas spinning is around an axis within the body and could therefore happen without changing location2. Of course Earth is both spinning and orbiting at once, so it is never spinning in place.

## Which coupling is used when the spin orbital interaction or coupling is more than the total angular momentum?

For heavier atoms, another coupling scheme called j-j coupling provides better agreement with experiment. In j-j coupling, the orbital angular momentum ℓ, and spin s, of each electron are first coupled to form a total angular momentum j for that electron.

Is spin relativistic?

Spin is not only explained by relativistic quantum mechanics. Spinors are described by the Dirac equation, but angular momentum was pat of the mathematics of quantum mechanics since its beginnings. Spin is just the intrinsic angular momentum of a particle. That’s why you can add →S and →L to get →J in the first place.

What is meant by LS and JJ coupling?

j-j Coupling In light atoms, the interactions between the orbital angular momenta of individual electrons is stronger than the spin-orbit coupling between the spin and orbital angular momenta. These cases are described by “L-S coupling”.

### Is rotate and spin the same?

Rotate and spin are mostly synonymous (when referring to the definitions regarding circular movement). The object moves in a circular motion around a central axis, but stays in the same location. A ceiling fan rotates.