That was my other main concern: By what method would you "specifically generate triplet helium"??
Thanks for the G W Drake link. I'm not too sure I understand it all....Of course, Selection rules prohibit single photon transitiion .... so it goes two photon route...OK, but this rate is extremely low, right?
I have read elsewhere that the most probable decay is thru 'collisional' process, I am not sure what that refers to ...any info there?
GW Drake has a later article in which it appears as if he is saying that there is a MORE probable Magnetic dipole transition to ground state decay...am I reading that right?