Gravitational Depolarization of Ultracold Neutrons: Comparison with Data
S. Afach, N.J. Ayres, C.A. Baker, G. Ban, G. Bison, K. Bodek, M., Fertl, B. Franke, P. Geltenbort, K. Green, W.C. Griffith, M. van der Grinten,, Z.D. Grujic, P.G. Harris, W. Heil, V. Helaine, P. Iaydjiev, S.N. Ivanov, M., Kasprzak, Y. Kermaidic, K. Kirch, H.-C. Koch, S. Komposch
TL;DR
This paper compares theoretical predictions of gravitationally enhanced depolarization of ultracold neutrons with experimental data, showing strong qualitative agreement and explaining previously unexplained observations.
Contribution
It provides the first detailed comparison between gravitational depolarization theory and experimental measurements in ultracold neutrons.
Findings
Qualitative agreement between theory and data
Depolarization rates depend on magnetic-field gradients
Gravitational effects explain previously unexplained data features
Abstract
We compare the expected effects of so-called gravitationally enhanced depolarization of ultracold neutrons to measurements carried out in a spin-precession chamber exposed to a variety of vertical magnetic-field gradients. In particular, we have investigated the dependence upon these field gradients of spin depolarization rates and also of shifts in the measured neutron Larmor precession frequency. We find excellent qualitative agreement, with gravitationally enhanced depolarization accounting for several previously unexplained features in the data.
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