title: ≃10 eV ionization shift in Ir Kα2 from a near-coincident Lu K-edge.
abstract: Close to an x-ray filter's K-edge the transmission depends strongly on the photon energy. For a few atom pairs, the K-edge of one is only a few tens of eV higher than a K-line energy of another, so that a small change in the line's energy becomes a measurable change in intensity behind such a matching filter. Lutetium's K-edge is ≃27 eV above iridium's Kα(2) line, ≃63.287 keV for cold Ir. A Lu filter reduces this line's intensity by ≃10 % when it is emitted by a plasma, indicating an ionization shift Δε≃10±1 eV.
authors.affiliation: Ecopulse, Inc, P.O. Box 528, Springfield, Virginia 22150, USA. ninorpereira@gmail.com
authors.forename: N R
authors.initials: NR
authors.lastname: Pereira
authors.forename: B V
authors.initials: BV
authors.lastname: Weber
authors.forename: D
authors.initials: D
authors.lastname: Phipps
authors.forename: J W
authors.initials: JW
authors.lastname: Schumer
authors.forename: J F
authors.initials: JF
authors.lastname: Seely
authors.forename: J J
authors.initials: JJ
authors.lastname: Carroll
authors.forename: J R
authors.initials: JR
authors.lastname: VanHoy
authors.forename: K
authors.initials: K
authors.lastname: Słabkowska
authors.forename: M
authors.initials: M
authors.lastname: Polasik