Multiple Auger cycle photoionisation of manganese atoms by short soft x-ray pulses. (6th April 2017)

• Record Type: Journal Article
• Authors: Klumpp, S; Gerken, N; Mertens, K; Richter, M; Sonntag, B; Sorokin, A A; Braune, M; Tiedtke, K; Zimmermann, P; Martins, M
• Is Part Of: New journal of physics. Volume 19:Number 4(2017:Apr.)
• Publication Date: 2017-04-06
• Subjects: nonlinear photoionisation -- short x-ray pulses -- atomic open shell system; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aa660a
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: The multiple ionisation of atomic Mn, excited at (photon energy: 52.1 eV) and above (photon energy: 61.1 eV) the discrete giant 3 p – 3 d resonance, was studied using high irradiation free-electron-laser soft x-ray pulses from the BL2 beamline of FLASH, DESY, Hamburg. In particular, the impact of the giant resonance on the ionisation mechanism was investigated. Ion mass-over-charge spectra were obtained by means of ion time-of-flight spectrometry. For the two photon energies, the yield of the different ionic charge states Mn q + ( q = 0–7) was determined as a function of the irradiance of the soft x-ray pulses. The maximum charge state observed was Mn 6+ for resonant excitation at 52.1 eV and Mn 7+ for non-resonant excitation at 61.1 eV at a maximum irradiation of 3 × 10 13 W cm − 2 .