journal menu
![[Figure 2]](gm5122fig2mag.jpg)
|
|
Figure 2
UV–Vis absorption spectroscopy changes induced by X-ray dose absorbed by sodium chloride and halogen substitutes. (a) UV–Vis absorption spectrum of 2 M sodium chloride under X-ray exposure, showing a distinct absorption peak at 345 nm. The change with increased dose is shown using a colour gradient from red at the start of the measurement to blue at the end of the measurement. The corresponding 3D plot underneath reveals the change with dose against increased absorption from blue (minimal change) to red (maximal change). (b) Substitution of the chloride anion in sodium salts with fluorine, bromine and iodine results in two distinct absorption peaks (λmax = 290 and 360 nm). (c) Substitution of the chloride anion with citrate significantly reduces the spectroscopic response. (d) The dose-dependent rise in absorption at 345 nm of the NaCl sample plateaus at approximately 2000 kGy. Mono-exponential fits (black lines) derive dose constants of 0.63 MGy (2 M NaCl), 0.66 MGy (1 M NaCl), 1.44 MGy (0.5 M NaCl), 1.25 MGy (0.25 M NaCl) and 2.28 MGy (0.1 M NaCl). |
![[Figure 2]](gm5122fig2.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
access
