Photoluminescence in neutron irradiated fused silica

Martin, P.; León, María Celeste Dávila de; Ibarra, Á.

doi:10.1002/pssc.200460250

Cited by 12 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The origin of this band is still unknown. A band peaked around 2.3 eV (FWHM of about 0.5 eV) has been observed by Martin et al [13] in silica bulk samples irradiated with neutrons at fluences higher than 10 17 n/cm 2 . Since they reported the excitation of this PL, consisting of two bands peaked at 4.6 eV (FWHM of 0.6 eV) and 3.9 eV (FWHM of 0.64 eV), we decided to study its decay by exciting this PL near the maximum of its excitation spectrum, 4.43 eV.…”

Section: Photoluminescencesupporting

confidence: 54%

Influence of neutron and gamma-ray irradiations on rad-hard optical fiber

Morana¹,

Girard²,

Cannas³

et al. 2015

Opt. Mater. Express

View full text Add to dashboard Cite

We investigated point defects induced in rad-hard Fluorine-doped optical ﬁbers using both a mixed source of neutrons (ﬂuences from 1015 to 1017 n/cm2) and γ-rays (doses from 0.02 to 2 MGy) and by a γ-ray source (dose up to 10 MGy). By combining several complementary spectroscopic techniques such as radiation-induced attenuation, confocal micro-luminescence, time-resolved photo-luminescence and electron paramagnetic resonance, we evidenced intrinsic and hydrogen-related defects. The comparison between the two irradiation sources highlights\ud close similarities among the spectroscopic properties of the induced defects and the linear correlation of their concentration up to 1016 n/cm2. These results are interpreted on the basis of the generation processes of defects from precursors sites, that are common to both γ-rays and neutrons. In contrast, the highest neutron ﬂuence (1017 n/cm2) causes peculiar effects, such as the growth of a photoluminescence and variations of the spectral and decay properties of the emission related with nonbridging oxygen hole centers, that are likely due to silica network modiﬁcation

show abstract

Section: Photoluminescencesupporting

confidence: 54%

Influence of neutron and gamma-ray irradiations on rad-hard optical fiber

Morana¹,

Girard²,

Cannas³

et al. 2015

Opt. Mater. Express

View full text Add to dashboard Cite

show abstract

“…Another PL band is observed in the green region with characteristics depending on the radiation nature: we find that it is peaked at 527 nm for 10 17 n/cm 2 + > 2 MGy irradiated sample, whereas it is centered at 515 nm for 10 MGy irradiated sample. We acknowledge that a similar band was observed in [18], [19]; these finding suggest that neutrons induce an intrinsic peculiar defect characterized by this green photoluminescence. The radial distribution of the PL band at 530 nm, reported in Fig.…”

Section: B Spectroscopic Analysissupporting

confidence: 78%

Evaluation of Distributed OFDR-Based Sensing Performance in Mixed Neutron/Gamma Radiation Environments

Rizzolo

Boukenter

Marin

et al. 2017

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

We report the study of a radiation resistant single mode optical fiber doped with fluorine exposed to mixed neutron and gamma-radiation up to 10(17) n/cm(2) fluence and >2 MGy dose to evaluate its performances when used as the sensing element of a distributed Optical Frequency Domain Reflectometry (OFDR). The use of complementary spectroscopic techniques highlights some differences between the responses of solely gamma-radiation (10 MGy) or mixed neutron and. (10(17) n/cm2 + >2 MGy) irradiated samples. Those differences are linked to the defect generation rather than to structural changes of the a-SiO2 host matrix. We show that a modification of the refractive index of similar to 10(-5) is induced at the highest investigated neutron fluence. However, the feasibility of distributed temperature measurements along the irradiated fiber is demonstrated with an accuracy of 0.1 degrees C over a sensing length up to similar to 130 m with the tested OBR4600 interrogator. These results are very promising for the integration of OFDR sensors in mixed neutron and gamma radiation environments

show abstract

“…We focused this work on the structural changes occurring in these various glasses at such high doses and fluences, as a complete study on the optical changes induced by γ-rays and neutron irradiation has already been done in the same samples [18,19,20,21,22,23]. To highlight the radiation induced mechanisms for both photons and neutrons, we have characterized the glass properties before and after both types of irradiations.…”

Section: Introductionmentioning

confidence: 99%

Neutron irradiation effects on the structural properties of KU1, KS-4V and I301 silica glasses

Leon¹,

Giacomazzi²,

Girard³

et al. 2013

2013 14th European Conference on Radiation and Its Effects on Components and Systems (RADECS)

Self Cite

View full text Add to dashboard Cite

In this work we have studied the effects of high neutron fluencies and gamma doses on the structural properties of three different types of silica glasses: two high purity silica with different OH content, KU1 (800 ppm) and KS-4V (<0.2 ppm); and a commercial silica Infrasil 301 (<8 ppm). The experimental results (Raman and FTIR spectra) have been compared with ab-initio simulations and show that, while the changes on the structure of the gamma irradiated silica are not significant, the structural changes due to neutron irradiation result in an increase of the number of strained bonds responsible of the formation of new defects which alter the optical properties of the glasses.

show abstract

Photoluminescence in neutron irradiated fused silica

Cited by 12 publications

References 12 publications

Influence of neutron and gamma-ray irradiations on rad-hard optical fiber

Influence of neutron and gamma-ray irradiations on rad-hard optical fiber

Evaluation of Distributed OFDR-Based Sensing Performance in Mixed Neutron/Gamma Radiation Environments

Neutron irradiation effects on the structural properties of KU1, KS-4V and I301 silica glasses

Contact Info

Product

Resources

About