We report on an experimental investigation of the infrared Radio-Luminescence (iRL) emission of interstitial O2 molecules loaded in radiation hardened pure-silica-core and fluorine-doped silica-based optical fibers (OFs). The O2 loading treatment successfully dissolved high concentrations of oxygen molecules into the silica matrix. A sharp luminescence at 1272 nm was detected when 2.5 cm of the treated OFs were irradiated with 10 keV X-rays. This emission originates from the radiative decay of the first excited singlet state of the embedded O2 molecules. The dose, dose-rate, and temperature dependencies of the infrared emission are studied through in situ optical measurements. The results show that the iRL is quite stable in doses of up to 1 MGy(SiO2) and is linearly dependent on the dose-rate up to the maximum investigated doserate of 200 kGy(SiO2)/h. The temperature dependency of the iRL shows a decrease in efficiency above 200 C, which is attributed to the non-radiative decay of the excited O2 molecules. The results obtained and the long-term stability of the O2-loading treatment (no out-gassing effect) strongly suggest the applicability of these components to real-time remote dosimetry in environments characterized by high radiation doses and dose-rates.

Di Francesca, D., Girard, S., Agnello, S., Marcandella, C., Paillet, P., Boukenter, A., et al. (2014). Near infrared radio-luminescence of O2 loaded radiation hardened silica optical fibers: A candidate dosimeter for harsh environments. APPLIED PHYSICS LETTERS, 105(13) [10.1063/1.4901340].

Near infrared radio-luminescence of O2 loaded radiation hardened silica optical fibers: A candidate dosimeter for harsh environments

DI FRANCESCA, Diego;AGNELLO, Simonpietro;GELARDI, Franco Mario;
2014

Abstract

We report on an experimental investigation of the infrared Radio-Luminescence (iRL) emission of interstitial O2 molecules loaded in radiation hardened pure-silica-core and fluorine-doped silica-based optical fibers (OFs). The O2 loading treatment successfully dissolved high concentrations of oxygen molecules into the silica matrix. A sharp luminescence at 1272 nm was detected when 2.5 cm of the treated OFs were irradiated with 10 keV X-rays. This emission originates from the radiative decay of the first excited singlet state of the embedded O2 molecules. The dose, dose-rate, and temperature dependencies of the infrared emission are studied through in situ optical measurements. The results show that the iRL is quite stable in doses of up to 1 MGy(SiO2) and is linearly dependent on the dose-rate up to the maximum investigated doserate of 200 kGy(SiO2)/h. The temperature dependency of the iRL shows a decrease in efficiency above 200 C, which is attributed to the non-radiative decay of the excited O2 molecules. The results obtained and the long-term stability of the O2-loading treatment (no out-gassing effect) strongly suggest the applicability of these components to real-time remote dosimetry in environments characterized by high radiation doses and dose-rates.
Settore FIS/01 - Fisica Sperimentale
Di Francesca, D., Girard, S., Agnello, S., Marcandella, C., Paillet, P., Boukenter, A., et al. (2014). Near infrared radio-luminescence of O2 loaded radiation hardened silica optical fibers: A candidate dosimeter for harsh environments. APPLIED PHYSICS LETTERS, 105(13) [10.1063/1.4901340].
File in questo prodotto:
File Dimensione Formato  
APL14-105-183508-DiFrancesca.pdf

Solo gestori archvio

Descrizione: articolo principale
Dimensione 853.87 kB
Formato Adobe PDF
853.87 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/103550
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 11
social impact