Addendum to: “The cross sections for one phonon emission and absorption by slow neutrons in superfluid liquid Helium” [Comput. Phys. Comm. 151 (2) (2003) 141–148]: Angular distribution of UCN

The UCN differential angular distribution produced by superfluid liquid helium down-scattering was numerically computed in conjunction with the previous works of the total cross sections [H. Yoshiki, Comput. Phys. Comm. 151 (2003) 141–148]. The distribution for the maximum UCN energy limit of 252 neV (Be barrier potential) is very nearly isotropic.