X-ray irradiation-induced coloration of manganese in soda-lime silicate glass

The spectroscopic analysis of -irradiated glass by colorimetry, ESR and XPS

“…6). The peak observed at 315 nm was induced by Sn (Yamashita et al, 2004), and the absorbance was increased linearly up to 9 kGy, similar to the results from colorimetry. Various dosimetric ranges have been reported by numerous investigators.…”

The representation of skin colour in medieval stained glasses: The role of manganese

“…The beamline allows a micro-beam size of about 2*2 μm 2 , which makes it possible to select glass surfaces that are devoid of excessive alteration and are not covered by grisaille. However, as the use of a microbeam causes photoreduction or photooxidation effects (e.g., Chalmin et al, 2009;Ferrand et al, 2015;Yamashita et al, 2004), the beam was defocused to cover a larger area (15x15 μm 2 ), reducing the exposure per unit area of the sample. The stability of the measurements suggests that possible photoinduced effects have a limited impact on the experimental redox values.…”

Laser–induced defect centers and valence state change of Mn ions in sodium borate glasses

“…The excitation spectra for the emission of Mn 2+ in Fig. 3 shows 350, 410 and broad side band, which are the excited states of Mn 2+ ions [6]. After laser irradiation, the bands of Mn 2+ at 350 and 410 nm decreased.…”

“…2 shows the photoluminescence spectra under excitation at 325 nm for the 0.1 mol% Mn-doped glass before (a) and after (b) the laser irradiation of 400 mW.The spectra are corrected for optical density of an undoped sample. The emission band at 600 nm can be attributed to the 4 A 1 -6 A 1 transition of Mn 2+ [6] and the induced broad emission band at 400 nm might be originated from defects produced by laser irradiation. The emission intensity of Mn 2+ decreased and the intensity of defect emission increased as the laser exposure increased.…”