Date of Original Version
We develop a theory of ultracold and very cold neutron scattering on viscoelastic surface waves up to second-order perturbation theory. The results are applied to reanalyze the 1989 neutron-lifetime experiment using ultracold neutron storage in a Fomblin-coated vessel by Mampe et al. [Phys. Rev. Lett. 63, 593 (1989)]. Inclusion of this theory of the quasielastic scattering process in the data analysis shifts the neutron lifetime value from 887.6 ± 3 to 882.5 ± 2.1 s.
Steyerl, A., Pendlebury, J. M., Kaufman, C., Malik, S. S., & Desai, A. M. (2012). Quasielastic scattering in the interaction of ultracold neutrons with a liquid wall and application in a reanalysis of the Mambo I neutron-lifetime experiment. Physical Review C, 85, 065503. doi: 10.1103/PhysRevC.85.065503
Available at: http://dx.doi.org/10.1103/PhysRevC.85.065503