liquid A1

liquid A1

[′lik·wəd ′ā ′wən]
(cryogenics)
A phase of liquid helium-3 intermediate between liquid A and liquid B that appears only in the presence of a magnetic field and then only in a narrow portion of the pressure-temperature diagram, and in which only pairs of one of the three possible nuclear spin states are superfluid. Also known as A1 phase.
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