Parity Violation in the 3.2 eV p-wave Neutron Resonance in 131Xe
Abstract
Time reversal (TR) violation in polarized neutron transmission through polarized nuclei can be used to search for beyond the Standard Model physics. A few heavy nuclei including 139La, 81Br, and 131Xe can amplify both parity-odd and parity-odd/time-reversal odd effects due to their mixing of s-wave and p-wave resonances. We focus on 131Xe, where a previous experiment observed a large P-odd asymmetry in the 3.2eV p-wave resonance of 131Xe. We present the design for a cryogenic, solid Xe target to be used in a remeasurement of the P-odd asymmetry on the 3.2 eV resonance to higher precision. We will use a polarized 3He neutron spin filter to polarize the 3.2 eV neutrons. It has also been shown that 131Xe is polarizable using spin exchange optical pumping techniques, which will be important for future tests measuring TR asymmetry.
This work is supported by NSF Grant PHY-1614545.- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..DNP.FL004O