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  • Nuclear physicists have found that the internal structures of protons and neutrons may be altered in different ways inside nuclei

  • A precision measurement of the neutron skin in a calcium nucleus surprisingly reveals a thinner skin than expected from a similar measurement in lead

  • EIC Center at Jefferson Lab

    The Electron-Ion Collider Center at Jefferson Lab (EIC2@JLab) is an organization to advance and promote the science program at a future electron-ion collider (EIC) facility. Particular emphasis is on the close connection of EIC science to the current Jefferson Lab 12 GeV CEBAF science program.   

    "EIC Center"At the heart of the atom are protons and neutrons. The characteristics and interactions of neutrons and protons, singly and collectively in the nuclei are responsible for how our cosmos developed and how our sun provides the heat that sustains the eco-system on earth. 

    While we have known for 50 years that protons and neutrons are made of quarks and gluons (represented in the figure to the left as spheres with arrows and springs, respectively), we are just beginning to learn how to image the structure and interactions inside protons and neutrons that are at the femto-scale, a million times smaller than the nano-scale of modern micro-electronics.

    Jefferson Lab has been at the forefront of this research; the current 12 GeV CEBAF program at JLab is world-leading in this science. The proposed Electron-Ion Collider will be the ultimate instrument for this new science: nuclear femtography.

     

     

    More detailed information about the Electron-Ion Collider can be found at the following links:

     

    NEWS:

    JLab News: Nuclear Science Advisory Committee Issues Plan for U.S. Nuclear Physics Research

    Featured Video
    Featured video caption
    Charting the Inner Structure of the Proton
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    Electron Scattering off the Proton Inside the Nucleus
    Electron Scattering off the Proton Inside the Nucleus
    Quarks and Gluons Inside Protons and Neutrons
    Quarks and Gluons Inside Protons and Neutrons

  • Thomas Jefferson National Accelerator Facility is a U.S. Department of Energy Office of Science national laboratory. Jefferson Lab's unique and exciting mission is to expand our knowledge of the universe by studying the basic building blocks of matter within the nucleus: subatomic particles known as quarks and gluons.

  • Nuclear theorists put pen to paper and code to computer to detail a subatomic particle’s inner structure.

  • Physicists develop a universal function that suggests that proton-neutron pairs in the nucleus may explain why quarks inside nuclei have lower average momenta than predicted.

  • Built with detector technologies used in nuclear physics experiments, the system monitors radiation treatments in hard-to-reach areas.

  • LDRD Home

     

     

    What is Laboratory Directed Research and Development?.

  • A new study has confirmed that increasing the number of neutrons as compared to protons in the atom’s nucleus also increases the average momentum of its protons.

  • The determination of the pressure distribution inside the proton is the first measurement of a mechanical property of a subatomic particle. The measurement found that the proton’s building blocks, quarks, are subjected to a pressure of 100 decillion Pascal (1035) near the center of a proton, which is about 10 times greater than the pressure in the heart of a neutron star.