- #1
wdlang
- 307
- 0
i am now reading the book by woodgate: elementary atomic strucure, 2nd edition.
on page 62, he discusses the spin-orbit coupling in hydrogen atom, and calculates the first order shift of the energy due to this effect.
I have some doubt about his procedure from eq.4.25 to eq.4.27
the spin-orbit coupling is f(r) s \dot l
its average is then <f(r) s\dot l>
why can he take the equality <f(r) s \dot l>= <f(r)> <s \dot l> ?
this greatly simplifes the calculation!
on page 62, he discusses the spin-orbit coupling in hydrogen atom, and calculates the first order shift of the energy due to this effect.
I have some doubt about his procedure from eq.4.25 to eq.4.27
the spin-orbit coupling is f(r) s \dot l
its average is then <f(r) s\dot l>
why can he take the equality <f(r) s \dot l>= <f(r)> <s \dot l> ?
this greatly simplifes the calculation!