= J. Hans D. Jensen
{c}
{tag=Physicist}
{title2=1907–1973}
{wiki}
= Johannes Hans Daniel Jensen
{c}
{synonym}
= Hans Daniel Jensen
{c}
{synonym}
= Hans Jensen
{c}
{synonym}
= J. H. D. Jensen
{c}
{synonym}
<J. Hans D. Jensen> developed a <nuclear shell model> in which strong <spin-orbit coupling> reorganizes the levels available to <protons> and <neutrons>. The mechanism connects the observed nuclear <magic numbers> with gaps in a one-particle spectrum: filling a level with total <angular momentum> $j$ accommodates $2j+1$ magnetic substates. His historical lecture describes how measured nuclear <spins>, binding patterns and other spectroscopic evidence constrained the model, rather than treating the choice of level ordering as purely mathematical.<Glimpses at the History of the Nuclear Structure Theory by Johannes Hans Daniel Jensen>[Nobel lecture, p. 47, empirical shell evidence and strong spin–orbit coupling]{ref}
A <physicist>.https://www.physik.uni-heidelberg.de/historisches?lang=de[Independent professional profile]{ref}
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{title=Portrait of <J. Hans D. Jensen>}
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