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In a batch of liquid helium (say < 8* K.) is there a mixture of both ortho and para-helium, or is it only ground state para-helium.?
I was under the impression that ortho was a meta-stable state which cannot decay to ground state Para-helium by radiative emission, but by meta-stable we are talking only a fraction of a second...right?
What am I missing here.?
Anyone?
..
I was under the impression that ortho was a meta-stable state which cannot decay to ground state Para-helium by radiative emission, but by meta-stable we are talking only a fraction of a second...right?
What am I missing here.?
Anyone?
..