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Radiation effect on cathodoluminescence and thermoluminescence emission of Ca‐rich oxalates from the human body
Author(s) -
Correcher Virgilio,
Briatte Celine,
Boronat Cecilia,
GarciaGuinea Javier
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3571
Subject(s) - cathodoluminescence , thermoluminescence , luminescence , analytical chemistry (journal) , chemistry , thermogravimetric analysis , spectroscopy , emission spectrum , oxalate , oxygen , materials science , spectral line , inorganic chemistry , physics , optoelectronics , environmental chemistry , organic chemistry , quantum mechanics , astronomy
The radiation effect of luminescence emission of Ca‐rich oxalate biogenic materials (gallbladder and renal calculi) and a commercial standard sample (CaC 2 O 4 ·H 2 O) is reported. The samples were characterized by environmental scanning electron microscopy, energy dispersive X‐ray spectroscopy, thermogravimetric and differential thermal analyses, display complex cathodoluminescence (CL) and thermoluminescence (TL) glow emissions. CL spectra (in the UV−infrared range) displayed non‐well defined peaks, and exhibited emission at: (i) higher energies (300–490 nm) mainly associated with non‐bridging oxygen hole centers, oxygen‐deficient centers and peroxy intrinsic defects, regardless of the sample; and (ii) higher, narrow and sharp wavebands, in the red region, probably induced by the presence of traces of Sm 3+ ( 4 G 5/2 → 6 H 9/2 transition) and/or Tb 3+ ( 5 D 4 → 7 F 3 transition) only for mineral‐like materials in the human body. The UV‐blue TL emission showed low‐intensity maxima in which it was possible to distinguish at least four groups of components in each sample.