title: Determination of107Pd in Pd Recovered by Laser-Induced Photoreduction with Inductively Coupled Plasma Mass Spectrometry.
abstract: Safety evaluation of a radioactive waste repository requires credible activity estimates confirmed by actual measurements. A long-lived radionuclide,107Pd, which can be found in radioactive wastes, is one of the difficult-to-measure nuclides and results in a deficit in experimentally determined contents. In this study, a precipitation-based separation method has been developed for the determination of107Pd with inductively coupled plasma mass spectrometry. The photoreduction induced by pulsed laser irradiation at 355 nm provides short-time and one-step recovery of Pd. The proposed method was verified by applying it to a spent nuclear fuel sample. To recover Pd efficiently, a natural Pd standard was employed as the Pd carrier. Taking advantage of the absence of102Pd in spent nuclear fuel,102Pd in the Pd carrier was utilized as the internal standard. The chemical yield of Pd was about 90% with virtually no impurities, allowing accurate quantification of107Pd. The amount of107Pd in the Pd precipitate was 17.3 ± 0.7 ng, equivalent to 239 ± 9 ng per mg of238U in the sample.
authors.affiliation: Nuclear Science and Engineering Center, Japan Atomic Energy Agency , Ibaraki 319-1195, Japan.
authors.forename: Shiho
authors.identifier: 0000-0002-1816-6709
authors.initials: S
authors.lastname: Asai
authors.affiliation: Nuclear Science and Engineering Center, Japan Atomic Energy Agency , Ibaraki 319-1195, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Yomogida
authors.affiliation: Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology , Ibaraki 319-1106, Japan.
authors.forename: Morihisa
authors.initials: M
authors.lastname: Saeki
authors.affiliation: Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology , Ibaraki 319-1106, Japan.
authors.forename: Hironori
authors.initials: H
authors.lastname: Ohba
authors.affiliation: Nuclear Science and Engineering Center, Japan Atomic Energy Agency , Ibaraki 319-1195, Japan.
authors.forename: Yukiko
authors.initials: Y
authors.lastname: Hanzawa
authors.affiliation: Nuclear Science and Engineering Center, Japan Atomic Energy Agency , Ibaraki 319-1195, Japan.
authors.forename: Takuma
authors.initials: T
authors.lastname: Horita
authors.affiliation: Nuclear Science and Engineering Center, Japan Atomic Energy Agency , Ibaraki 319-1195, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kitatsuji