Register to reply

Selection rules for helium

by Niles
Tags: helium, rules, selection
Share this thread:
Feb15-12, 05:04 AM
P: 1,863

I am reading about transition in Helium, and I have come across a question. It is clear that triplet-singlet transition are not allowed, i.e. ΔS=0. But in my book (Foot's Atomic Physics) it says that Δl = 1. This is what I don't understand. The selection rule Δl = 1 we derived for Hydrogen, where there was no electrostatic interaction and only a single electron making the transition. In Helium we *do* have an electrostatic interaction and two electrons -- then how can we reuse Δl = 1 again?

Phys.Org News Partner Physics news on
'Squid skin' metamaterials project yields vivid color display
Scientists control surface tension to manipulate liquid metals (w/ Video)
Simulation method identifies materials for better batteries
Feb18-12, 10:36 AM
P: 32
In a textbook I find that the rule of transition can be deducted by Einstein's A,B cofficients,and use the wavefunction of hydrogen.

Register to reply

Related Discussions
Selection Rules Atomic, Solid State, Comp. Physics 0
Selection Rules Question Quantum Physics 3
Help for selection rules Quantum Physics 1
Dipole selection rules Advanced Physics Homework 0
Selection rules Atomic, Solid State, Comp. Physics 0