Experimental investigation of the origin of the Ti K{alpha}{sup ''} satellites

• Published in: Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2004-05, Vol.69 (5)
• Main Authors: Shigeoka, N., Oohashi, H., Tochio, T., Ito, Y., Mukoyama, T., Vlaicu, A. M., Fukushima, S., Kansai Gaidai University, 16-1 Nakamiyahigashino, Hirakata, Osaka 573-1001, National Institute for Material Science, SPring-8, Mikazuki, Hyogo 679-5198
• Format: Article
• Language: English
• Subjects: ATOMIC AND MOLECULAR PHYSICS; EV RANGE; EXCITATION; EXCITED STATES; HOLES; PHOTOIONIZATION; PHOTON-ATOM COLLISIONS; SPRING-8 STORAGE RING; THRESHOLD ENERGY; TITANIUM; X-RAY SPECTRA; X-RAY SPECTROSCOPY
• ISSN: 1050-2947; 1094-1622
• DOI: 10.1103/PhysRevA.69.052505

The Ti K{alpha}{sup ''} satellite is investigated using a Johann-type spectrometer on the BL15XU undulator beam line of SPring-8 at excitation energies between 4996 and 7000 eV. The intensity of the K{alpha}{sup ''} satellite relative to that of K{alpha}{sub 1,2} exhibits an abrupt jump from 0% to {approx}1% in a range of 10 eV around an excitation energy of 5010 eV. The energy range to reach saturation is {approx}500 eV. The creation of spectator holes is implicated to be due to shake-up processes, inducing the emergence of the K{alpha}{sup ''} satellite. The onset energy for the appearance of the satellite is 5011.0 eV{+-}0.8 eV, corresponding to the [1s3p] double-ionization threshold energy by a Z+1 approximation. The experimental results obtained in this work confirm that the K{alpha}{sup ''} satellite originates from a 3p spectator hole, as predicted theoretically by Scott [ Phys. Rev. A 34, 4438 (1986) ].