Date of Original Version
We analyze the depolarization of ultracold neutrons confined in a magnetic field configuration similar to those used in existing or proposed magnetogravitational storage experiments aiming at a precise measurement of the neutron lifetime. We use an approximate quantum mechanical analysis such as pioneered by Walstrom et al [Nucl. Instrum. Methods Phys. Res. A 599, 82 (2009)]. Our analysis is not restricted to purely vertical modes of neutron motion. The lateral motion is shown to cause the predominant depolarization loss in a magnetic storage trap.
A. Steyerl, C. Kaufman, G. Müller, S. S. Malik, and A. M. Desai. Spin-flip loss in magnetic storage of ultracold neutrons. In Next Generation Experiments to Measure the Neutron Lifetime, S. J. Seestrom (Ed.), pp. 75-86, World Scientific Publishing (2014). [arXiv:1307.5207]