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Proceedings Paper

Ionizing radiation detection by Yb-doped silica optical fibers
Author(s): Cristina De Mattia; Ivan Veronese; Mauro Fasoli; Norberto Chiodini; Eleonora Mones; Marie Claire Cantone; Simone Cialdi; Marco Gargano; Nicola Ludwig; Letizia Bonizzoni; Anna Vedda
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Paper Abstract

Rare earths-doped silica optical fibers have shown promising results for ionizing radiation monitoring, thanks to their radio-luminescence (RL) properties. However, the use of these systems for accurate and precise dosimetric measurements in radiation fields above the Cerenkov energy threshold, like those employed in radiation therapy, is still challenging, since a spurious luminescence, namely the “stem effect,” is also generated in the passive fiber portion exposed to radiation. The spurious signal mainly occurs in the UV-VIS region, therefore a dopant emitting in the near infrared may be suitable for an optical discrimination of the stem effect.

In this work, the RL and dosimetric properties of Yb-doped silica optical fibers, produced by sol-gel technique, are studied, together with the methods and instruments to achieve an efficient optical detection of the Yb3+ emission, characterized by a sharp line at about 975 nm.

The results demonstrate that the RL of Yb3+ is free from any spectral superposition with the spurious luminescence. This aspect, in addition with the suitable linearity, reproducibility, and sensitivity properties of the Yb-doped fibers, paves the way to their use in applications where an efficient stem effect removal is required.

Paper Details

Date Published: 26 August 2015
PDF: 7 pages
Proc. SPIE 9593, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVII, 95931G (26 August 2015); doi: 10.1117/12.2190767
Show Author Affiliations
Cristina De Mattia, Univ. degli Studi di Milano (Italy)
Ivan Veronese, Univ. degli Studi di Milano (Italy)
Mauro Fasoli, Univ. degli Studi di Milano-Bicocca (Italy)
Norberto Chiodini, Univ. degli Studi di Milano-Bicocca (Italy)
Eleonora Mones, Azienda Ospedaliera Maggiore della Carità (Italy)
Marie Claire Cantone, Univ. degli Studi di Milano (Italy)
Simone Cialdi, Univ. degli Studi di Milano (Italy)
Marco Gargano, Univ. degli Studi di Milano (Italy)
Nicola Ludwig, Univ. degli Studi di Milano (Italy)
Letizia Bonizzoni, Univ. degli Studi di Milano (Italy)
Anna Vedda, Univ. degli Studi di Milano-Bicocca (Italy)


Published in SPIE Proceedings Vol. 9593:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVII
Larry Franks; Ralph B. James; Michael Fiederle; Arnold Burger, Editor(s)

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