Skip to Main content Skip to Navigation
Journal articles

Momentum sharing in imbalanced Fermi systems

Abstract : The atomic nucleus is composed of two different kinds of fermions: protons and neutrons. If the protons and neutrons did not interact, the Pauli exclusion principle would force the majority of fermions (usually neutrons) to have a higher average momentum. Our high-energy electron-scattering measurements using C-12, Al-27, Fe-56, and Pb-208 targets show that even in heavy, neutron-rich nuclei, short-range interactions between the fermions form correlated high-momentum neutron-proton pairs. Thus, in neutron-rich nuclei, protons have a greater probability than neutrons to have momentum greater than the Fermi momentum. This finding has implications ranging from nuclear few-body systems to neutron stars and may also be observable experimentally in two-spin-state, ultracold atomic gas systems.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-01089055
Contributor : Emmanuelle Vernay <>
Submitted on : Monday, December 1, 2014 - 9:23:07 AM
Last modification on : Thursday, November 26, 2020 - 7:40:01 PM

Links full text

Identifiers

Collections

Citation

O. Hen, J. Ball, E. Voutier, R. Dupre, M. Garcon, et al.. Momentum sharing in imbalanced Fermi systems. Science, American Association for the Advancement of Science, 2014, 346 (6209), pp.614-617. ⟨10.1126/science.1256785⟩. ⟨in2p3-01089055⟩

Share

Metrics

Record views

346