Test of Parity-Conserving Time-Reversal Invariance Using Polarized Neutrons and Nuclear Spin Aligned Holmium

Abstract

A test of parity-conserving, time-reversal non-invariance (PC TRNI) has been performed in 5.9 MeV polarized neutron transmission through nuclear spin aligned holmium. The experiment searches for the T-violating five-fold correlation via a double modulation technique - flipping the neutron spin while rotating the alignment axis of the holmium. Relative cross sections for spin-up and spin-down neutrons are found to be equal to within $1.2\times 10^{-5}$ (80\% confidence). This is a two order of magnitude improvement compared to traditional detailed balance studies of time reversal, and represents the most precise test of PC TRNI in a dynamical process.

4 pages, 2 figures, accepted for 10Jun96 issue of PRL, revtex and psfig

References in corpus (5)

• Test of Time Reversal Invariance in Proton Deuteron System
• Effective Lagrangians and Parity-Conserving Time-Reversal Violation at Low Energies
• A Microscopic T-Violating Optical Potential: Implications for Neutron-Transmission Experiments
• Optical-Model Description of Time-Reversal Violation
• Limit on T-Violating P-Conserving $\rho NN$ Interaction from the $\gamma$ Decay of ${}^{57}$Fe

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• General relativity effects in precision spin experimental tests of fundamental symmetries
• Constraining Spacetime Nonmetricity with Neutron Spin Rotation in Liquid He-4
• New approach to search for parity-even and parity-odd time-reversal violation beyond the Standard Model in a storage ring
• Time Reversal Invariance Violating and Parity Conserving effects in Neutron Deuteron Scattering
• Neutron spin dynamics in polarized targets
• Parity-Even and Time-Reversal-Odd Neutron Optical Potential in Spinning Matter Induced by Gravitational Torsion
• Testing T Invariance in the Interaction of Slow Neutrons with Aligned Nuclei
• Extraction of bounds on time-reversal non-invariance from neutron reactions
• Test of time-reversal symmetry in the proton-deuteron scattering
• Fresh Look at Polarized Deuterons at the Nuclotron/NICA \& HIAF and Beyond