The particle-induced X-ray emission (PIXE)-alpha portable spectrometer of the Laboratori Nazionali del Sud has been upgraded to improve X-ray energy resolution and efficiency. A value of 124 eV at Mn Κa-line and a factor of 3 were, respectively, achieved. These enhanced capabilities allowed the thin surface examination of 5 Roman nummi, in which previous near-surface X-ray fluorescence measurements revealed traces of mercury. In particular, the new version of the PIXE-alpha spectrometer has allowed the distinction of the 2.19 keV Hg M-line from the 2.30 keV S K-line and the 2.34 keV Pb M-line. Subsequent elemental association has demonstrated a correlation between surface mercury and silver.
|Titolo:||The new PIXE-alpha spectrometer for the analysis of Roman nummi surfaces|
|Autori interni:||RIZZO, Francesca|
|Data di pubblicazione:||2013|
|Appare nelle tipologie:||1.1 Articolo in rivista|