title: Decay chains and photofission investigation based on nuclear spectroscopy of highly enriched uranium sample.
abstract: Nuclear spectroscopy experiments were performed for 100g metallic uranium rod enriched to 93% (235)U, in order to establish and characterize the most prominent γ-rays in the natural decay series and photofission reaction. Single γ-ray spectra and γ-γ coincidences measurements were conducted before irradiation. The uranium sample was subsequently irradiated with 15 MeV bremsstrahlung photons. Relative intensities of γ-lines and several values of half-lives of the fission fragments decays were determined. The obtained information can be utilized in detection of smuggled nuclear materials and characterization of bulky nuclear waste packages.
authors.affiliation: National Centre for Nuclear Research, 05-400 Otwock-Swierk, Poland. Electronic address: Pawel.Sibczynski@ncbj.gov.pl.
authors.forename: P
authors.initials: P
authors.lastname: Sibczynski
authors.forename: J
authors.initials: J
authors.lastname: Kownacki
authors.forename: A
authors.initials: A
authors.lastname: Syntfeld-Kazuch
authors.forename: M
authors.initials: M
authors.lastname: Moszynski
authors.forename: M
authors.initials: M
authors.lastname: Kisielinski
authors.forename: W
authors.initials: W
authors.lastname: Czarnacki
authors.forename: K
authors.initials: K
authors.lastname: Kosinski
authors.forename: M
authors.initials: M
authors.lastname: Matusiak
authors.forename: M
authors.initials: M
authors.lastname: Klimasz
authors.forename: M
authors.initials: M
authors.lastname: Kowalczyk
authors.forename: T
authors.initials: T
authors.lastname: Abraham
authors.forename: J
authors.initials: J
authors.lastname: Mierzejewski
authors.forename: J
authors.initials: J
authors.lastname: Srebrny
keywords: Detection of concealed nuclear materials; Gamma ray spectroscopy; Highly enriched uranium; Photofission; Radioactive chain