What properties of bosons does supercooled He4 have? And why only when it is supercooled?

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I remember learning that He4 acts as a Boson when it is supercooled into a liquid state. The explination is because He4 has 4 spin 1/2 particles in its nucleus, which act as 1 spin 2 particle. What I'm not sure of is a.) I know supercooled He4 still takes up measurable space, unlike a Boson, so what properties does it have which make us say it acts like a boson? b.) why does it only have these properties when it is supercooled and c.) why doesn't every atom with even numbers of protons nuetrons behave this way?

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Weed_O_Whirler

Aerospace | Quantum Field Theory

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Posted: 13 years ago
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