Center for Exploration of Energy and Matter

   a research center of the Office of the Vice Provost for Research at IU Bloomington

Nuclear Physics and Nuclear Chemistry

CEEM was originally formed as a laboratory to study nuclear forces and the nuclei of atoms using the new cyclotrons constructed under funding from the National Science Foundation. Nuclei are the massive tiny core of atoms that give them their identity as specific isotopes of a given element. They are made up of protons, the number of which determine the element, and neutrons, the number of which determine the isotope. The goal of understanding the structure of nuclei has led to the exploration of the fundamental forces, the strong force and the weak force, and their symmetries, which are important at the nuclear level; the underlying quark and gluonic structure of the protons and neutrons; and nuclei under extreme conditions. CEEM continues as a base for these exciting research endeavors and the equipment development necessary to carry them out.


Studying the masses and properties of these nearly-massless, weakly-interacting particles
Principal Investigator: Rex Tayloe

Weak Interactions

Measuring parity violation in neutron radiative capture and spin rotation
Principal Investigator: Mike Snow

Solenoidal Tracker At RHIC (STAR)

Exploring the origins of the spin of the proton and the nature of quark-gluon matter
Principal Investigators: William Jacobs, Scott Wissink and Anselm Vossen

Belle and Belle II Experiments at KEK

Studying the spin dependent fragmentation of quarks into hadrons
Principal Investigators: William Jacobs and Anselm Vossen

aCORN ("Little 'a'")

Studying the properties of decaying neutrons
Principal Investigator: Edward Stephenson

Many Body Nuclear Dynamics

The dynamics of heavy-ion reactions
Principal Investigator: Romualdo De Souza

Electric Dipole Moment (EDM) Searches

This class of experiments searches using a variety of techniques for the sponatneous separation of positive and negative charges along the spin direction of a sub-atomic particle. A discovery of an EDM could lead to an explanation of the surplus of matter left over following the Big Bang. All such searches look for the effects of a strong, external electric field on the system.


Trapping ultra-cold neutrons in a liquid helium bath to measure their precession
Principal Investigators: Josh Long, Chen-Yu Liu, Mike Snow and Hans-Otto Meyer


Measuring the induced magnetic field of electron in a garnet crystal
Principal Investigator: Chen-Yu Liu

Storage Rings for Charged Particles

Looking for spin direction shifts as particles revolve around a beam storage ring
Principal Investigator: Edward Stephenson

Nuclear Physics Completed Projects

Cooler CSB

Measuring the breaking of charge symmetry in pion production from d+d fusion
Principal Investigators: Edward Stephenson and Andy Bacher

Polarized Internal Target Experiments

Detection of energy and direction to study the products of few-body reactions
Principal Investigator: Hans-Otto Meyer

Contact Us
2401 N. Milo B. Sampson Lane
Bloomington, IN 47408
Phone: (812) 855-9365
E-mail CEEM