Motional spin relaxation in large electric fields
- Creators
- Schmid, Riccardo
- Plaster, B.
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Filippone, B. W.
Abstract
We discuss the precession of spin-polarized ultracold neutrons (UCNs) and 3He atoms in uniform and static magnetic and electric fields and calculate the spin relaxation effects from motional v×E magnetic fields. Particle motion in an electric field creates a motional v×E magnetic field, which when combined with collisions produces variations of the total magnetic field and results in spin relaxation of neutron and 3He samples. The spin relaxation times T1 (longitudinal) and T2 (transverse) of spin-polarized UCNs and 3He atoms are important considerations in a new search for the neutron electric dipole moment at the Spallation Neutron Source nEDM experiment. We use a Monte Carlo approach to simulate the relaxation of spins due to the motional v×E field for UCNs and for 3He atoms at temperatures below 600 mK. We find the relaxation times for the neutron due to the v×E effect to be long compared to the neutron lifetime, while the 3He relaxation times may be important for the nEDM experiment.
Additional Information
©2008 The American Physical Society. (Received 16 May 2008; published 1 August 2008) We would like to thank M. Hayden for helpful discussions. The work in this paper was supported in part by the U.S. National Science Foundation, Grant No. PHY-0555674.Attached Files
Published - PhysRevA_78_023401.pdf
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Additional details
- Eprint ID
- 11520
- Resolver ID
- CaltechAUTHORS:SCHMpra08
- National Science Foundation
- PHY-0555674
- Created
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2008-08-27Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field