Absolute cross sections for photoionization of Xeq+ ions (1 %26lt;= q %26lt;= 5) at the 3d ionization threshold

作者：Schippers S^*; Ricz S; Buhr T; Borovik A Jr; Hellhund J; Holste K; Huber K; Schaefer H J; Schury D; Klumpp S; Mertens K; Martins M; Flesch R; Ulrich G; Ruehl E; Jahnke T; Lower J; Metz D; Schmidt L P H; Schoeffler M; Williams J B; Glaser L; Scholz F; Seltmann J; Viefhaus J; Dorn A; Wolf A; Ullrich J; Mueller A

来源：Journal of Physics B: Atomic, Molecular and Optical Physics , 2014, 47(11): 115602.

DOI：10.1088/0953-4075/47/11/115602

• photoionization of ions
• synchrotron radiation
• inner-shell processes
• photon-ion merged-beams experiments

The photon-ion merged-beams technique has been employed at the new (P) under bar hoton-(I) under bar on spectrometer at (PE) under bar TRA III for measuring multiple photoionization of Xeq+ ( q = 1-5) ions. Total ionization cross sections have been obtained on an absolute scale for the dominant ionization reactions of the type hv + Xeq+ -%26gt; Xer+ + (q - r)e(-) with product charge states q + 2 %26lt;= r %26lt;= q + 5. Prominent ionization features are observed in the photon-energy range 650-750 eV, which are associated with excitation or ionization of an inner-shell 3d electron. Single-configuration Dirac-Fock calculations agree quantitatively with the experimental cross sections for non-resonant photoabsorption, but fail to reproduce all details of the measured ionization resonance structures.

• 出版日期2014-6-14