title: Reference materials for neptunium determination.
authors.affiliation: National Physical Laboratory, Hampton Road, Teddington, MIddlesex TW11 0LW, United Kingdom. Electronic address: simon.jerome@npl.co.uk.
authors.forename: S M
authors.initials: SM
authors.lastname: Jerome
authors.affiliation: Idaho National Laboratory, USA.
authors.forename: K
authors.initials: K
authors.lastname: Carney
authors.affiliation: National Institute for Standards and Technology, USA.
authors.forename: R
authors.initials: R
authors.lastname: Essex
authors.affiliation: Los Alamos National Laboratory, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Fassbender
authors.affiliation: Department of Energy, USA.
authors.forename: S
authors.initials: S
authors.lastname: Goldberg
authors.affiliation: Idaho National Laboratory, USA.
authors.forename: M
authors.initials: M
authors.lastname: Kinlaw
authors.affiliation: Los Alamos National Laboratory, USA.
authors.forename: S P
authors.initials: SP
authors.lastname: LaMont
authors.affiliation: US Air Force, USA.
authors.forename: D
authors.initials: D
authors.lastname: Mackney
authors.affiliation: Department of Homeland Security, USA.
authors.forename: J J
authors.initials: JJ
authors.lastname: Morrison
authors.affiliation: Los Alamos National Laboratory, USA.
authors.forename: F M
authors.initials: FM
authors.lastname: Nortier