Abstract
Radio-photoluminescence in silver-doped phosphate glasses has been extensively used for X-ray dosimetry. In this paper, we present the potential of silver clusters for X-ray spatially resolved dosimetry. Those clusters are generated in phosphate glasses containing a high concentration of silver oxide by femtosecond direct laser writing technique. Two phosphate glasses of different compositions were investigated. First, the spectroscopic properties of the pristine glasses were studied after X-ray irradiation at different doses to assess their dosimetry potential. Second, the impact of X-rays on the three-dimensional inscribed silver clusters has been analyzed using several spectroscopies methods. Our analysis highlights the resilience of embedded silver clusters acting as local probes of the deposited doses. We demonstrate that these inscribed glasses can define the range and sensitivity of X-ray doses and consider the realization of spatially-resolved dosimeters.
Highlights
Since Schulman et al [1,2], radio-photoluminescence (RPL) has been extensively studied in silver-doped phosphate glasses [3,4], considered nowadays as a reliable passive radiation dosimetry technique for ionizing radiations (Gamma and X-rays) [5–8]
The generation of silver species has been investigated in two types of silver-containing phosphate glasses exposed to X-ray irradiation, which includes the formation of Ag2+ hole traps silver ions and Agm x+ silver clusters
This work has investigated the impact of X-rays in pristine and pre-inscribed silvercontaining phosphate glasses for both compositions
Summary
Since Schulman et al [1,2], radio-photoluminescence (RPL) has been extensively studied in silver-doped phosphate glasses [3,4], considered nowadays as a reliable passive radiation dosimetry technique for ionizing radiations (Gamma and X-rays) [5–8]. After exposure to ionizing radiation, such glasses exhibit an intense luminescence while excited with ultraviolet (UV) light, which is referred to as the radio-photoluminescence (RPL). An observed limitation is that the RPL signal continues to increase both during and after irradiation. This signal grows following a saturating, exponential-type model, reaching a steady-state level after some hours. This well-known mechanism is called the Chemosensors 2022, 10, 110. The RPL signal is stabilized by the use of post-irradiation annealing procedures [8,11]
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