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Re: [Phys-l] BEC



Aloysius Rusli wrote:

I would like to ask on the recent discoveries of Bose-Einstein Condensates : It is reported that Rb-85, Rb-87, NA-23, Li-7, are bosons, while to my understanding they contain odd numbers of protons and/or neutrons, which should cause them to be fermions instead.

Don't forget to count the electrons.

The criterion is an even number of fermions (not just an even
number of protons and/or neutrons).

Feynman volume III chapter 4.