Professor Chupp and his group pursue a program that uses precision measurement techniques and symmetry principles in particle physics investigations and applies the technology developed for those investigations to a variety of endeavors. The primary current efforts use polarized cold neutron beams and rare isotopes. The hadronic weak interaction is being studied in the n+p > d+gamma experiment currently at Los Alamos. Neutron beta-decay provides a probe of new physics that manifests time-reversal violation in the emiT experiment, which recently completed running at NIST. The new Fundamental neutron Physics Beamline at the SNS at Oak Ridge will provide a new generation of high precision experiments including n+p > d+gamma, PANDA, the Proton Asymmetry in Neutron Decay experiment, and abBA, a global set of neutron decay correlation measurements. Time revesal invariance violation is also manifest in the permanent electric dipole moments (EDMs) induced in atoms by elementary particle interactions beyond the Standard Model. Rare isotopes, e.g. 223-Rn, are used because large enhancements of time-reversal violating effects are expected due to octupole deformation of the nucleus. Experiment E-929 at TRIUMF will measure the EDM of 223-Rn. The Rare Isotope Accelerator, RIA, will produce much greater quantities of 223-Rn and provide for more precise measurements. We also continue to work on applications of laser polarized 129-Xe to medical imaging.

Click here to learn more about out group's research

PDF Version of "Medical Imaging with Laser Polarized Noble Gases"

Review Paper by Scott Swanson and Timothy Chupp

npdg 3He Documentation etc.

PANDA (polarized neutron decay)

The Group

Faculty: Tim Chupp

Graduate Students: Matt Bales, Behzad Ebrahimi , Monisha Sharma*, Eric Tardiff

Recent PhDs

Rob Cooper: The Radiative Decay Mode of the Free Neutron

Monisha Sharma: Precision Polarimetry and npdamma

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