title: Measurements of ultracold-neutron lifetimes in solid deuterium.
abstract: We present the first measurements of the survival time of ultracold neutrons (UCNs) in solid deuterium (SD2). This critical parameter provides a fundamental limitation to the effectiveness of superthermal UCN sources that utilize solid ortho-deuterium as the source material. These measurements are performed utilizing a SD2 source coupled to a spallation source of neutrons, providing a demonstration of UCN production in this geometry and permitting systematic studies of the influence of thermal up-scatter and contamination with para-deuterium on the UCN survival time.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors.forename: C L
authors.initials: CL
authors.lastname: Morris
authors.forename: J M
authors.initials: JM
authors.lastname: Anaya
authors.forename: T J
authors.initials: TJ
authors.lastname: Bowles
authors.forename: B W
authors.initials: BW
authors.lastname: Filippone
authors.forename: P
authors.initials: P
authors.lastname: Geltenbort
authors.forename: R E
authors.initials: RE
authors.lastname: Hill
authors.forename: M
authors.initials: M
authors.lastname: Hino
authors.forename: S
authors.initials: S
authors.lastname: Hoedl
authors.forename: G E
authors.initials: GE
authors.lastname: Hogan
authors.forename: T M
authors.initials: TM
authors.lastname: Ito
authors.forename: T
authors.initials: T
authors.lastname: Kawai
authors.forename: K
authors.initials: K
authors.lastname: Kirch
authors.forename: S K
authors.initials: SK
authors.lastname: Lamoreaux
authors.forename: C-Y
authors.initials: CY
authors.lastname: Liu
authors.forename: M
authors.initials: M
authors.lastname: Makela
authors.forename: L J
authors.initials: LJ
authors.lastname: Marek
authors.forename: J W
authors.initials: JW
authors.lastname: Martin
authors.forename: R N
authors.initials: RN
authors.lastname: Mortensen
authors.forename: A
authors.initials: A
authors.lastname: Pichlmaier
authors.forename: A
authors.initials: A
authors.lastname: Saunders
authors.forename: S J
authors.initials: SJ
authors.lastname: Seestrom
authors.forename: D
authors.initials: D
authors.lastname: Smith
authors.forename: W
authors.initials: W
authors.lastname: Teasdale
authors.forename: B
authors.initials: B
authors.lastname: Tipton
authors.forename: M
authors.initials: M
authors.lastname: Utsuro
authors.forename: A R
authors.initials: AR
authors.lastname: Young
authors.forename: J
authors.initials: J
authors.lastname: Yuan