title: Direct experimental verification of neutron acceleration by the material optical potential of solid 2H2.
abstract: We have measured the acceleration of neutrons by the material optical potential of solid 2H2. Using a gravitational spectrometer, we find a minimal kinetic energy Ec = (99+/-7) neV of neutrons from a superthermal ultracold neutron (UCN) source with solid 2H2 as an UCN converter. The result is in excellent agreement with theoretical predictions, Ec = 106 neV.
authors.affiliation: Physik-Department, Technische Universität München, Munich, Germany.
authors.forename: I
authors.initials: I
authors.lastname: Altarev
authors.forename: F
authors.initials: F
authors.lastname: Atchison
authors.forename: M
authors.initials: M
authors.lastname: Daum
authors.forename: A
authors.initials: A
authors.lastname: Frei
authors.forename: E
authors.initials: E
authors.lastname: Gutsmiedl
authors.forename: G
authors.initials: G
authors.lastname: Hampel
authors.forename: F J
authors.initials: FJ
authors.lastname: Hartmann
authors.forename: W
authors.initials: W
authors.lastname: Heil
authors.forename: A
authors.initials: A
authors.lastname: Knecht
authors.forename: J V
authors.initials: JV
authors.lastname: Kratz
authors.forename: T
authors.initials: T
authors.lastname: Lauer
authors.forename: M
authors.initials: M
authors.lastname: Meier
authors.forename: S
authors.initials: S
authors.lastname: Paul
authors.forename: Y
authors.initials: Y
authors.lastname: Sobolev
authors.forename: N
authors.initials: N
authors.lastname: Wiehl