= Harold Joseph Metcalf
{c}
{tag=Physicist}
= Harold J. Metcalf
{c}
{synonym}
= H. J. Metcalf
{c}
{synonym}
= Harold Metcalf
{c}
{synonym}
An experimental <atomic physicist> who coauthored a 1988 observation of <sodium> cooled below the <Doppler cooling limit>. The result exposed the limitations of a simple <Doppler cooling> description of <optical molasses>.<Observation of Atoms Laser Cooled below the Doppler Limit by Paul D. Lett and others>[Abstract: unexpectedly low temperatures]{ref}
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