Protons and neutrons that have briefly paired up in the nucleus have higher-average momentum, leaving less for non-paired nucleons. Researchers have now shown for the first time that this phenomenon exists in nuclei heavier than carbon, including aluminum, iron and lead and also surprisingly allows a greater fraction of protons than neutrons to have high momentum in these neutron-rich nuclei, contrary to long-accepted theories and with implications for ultra-cold atomic gas systems and neutron stars.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/frWV2zTfVh8/141016143704.htm
Protons hog the momentum in neutron-rich nuclei
16 octubre 2014
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