Silver addition in CaSO4:Eu, TL and TSEE properties

Junot, Danilo O.; Vasconcelos, Daiane F.; Chagas, Marcos Antonio Passos; Santos, M.A. Couto dos; Caldas, Linda V.E.; Souza, Divanízia do Nascimento

doi:10.1016/j.radmeas.2011.06.049

Cited by 13 publications

(7 citation statements)

References 6 publications

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“…In this study the samples are in powder. The difference in the number of TL peaks, when compared to that reported elsewhere (Sampaio et al, 2010;Junot et al, 2011;Dhabekar et al, 2006), shows that the study in powder can lead to a quite different TL response profile.…”

Section: Resultsmentioning

confidence: 58%

“…The visible signals were dispersed by a monochromator (0.3 m, Thermo Jarrell Ash 82497), detected either with a photomultiplier tube (PMT) (Hamamatsu R928) or an InGaAs detector, and amplified using a lock-in amplifier (Junot et al, 2011).…”

Section: Spectroscopic Measurementsmentioning

confidence: 99%

“…Due to its TL signal temperature (220 C), the 4 F 9/2 / 6 H 15/2 radiative transition at 484 nm, easy preparation and low fading, this phosphor is commercially applied as an environmental or personnel dosimeter (Chagas et al, 2010;Aypar, 1978;Zeng et al, 1996;Tanner et al, 2010). From the fundamentals point of view, CaSO 4 :Eu is a suitable sample because the europium is a spectroscopic probe (Bapat, 1977) as its two ionic states, 2þ and 3þ, are directly associated to its TL activity (Deng and Goldys, 2012), and the effect of the silver on the luminescence of the Eu 3þ ions has been a matter of current publications, including photonics and biotechnological applications (Sampaio et al, 2010;Junot et al, 2011). Recently, it has been reported that the composite CaSO 4 :Eu containing Ag(NP) shows TL and thermal stimulated exoelectronic emission (TSEE) signals enhanced by around 10 times (Dhabekar et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The CaSO4:Eu–Ag composite material: Thermo-photoluminescence study

Junot

Rodrigues

Souza

et al. 2014

Radiation Measurements

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Section: Resultsmentioning

confidence: 58%

Section: Spectroscopic Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The CaSO4:Eu–Ag composite material: Thermo-photoluminescence study

Junot

Rodrigues

Souza

et al. 2014

Radiation Measurements

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“…A Microstar reader (Landauer) was used to read the dosimeters. Pellets of CaSO4:Eu,Ag developed in our research center exhibit suitable behavior for thermoluminescent radiation dosimetry [14]. Accordingly, to verify the sample irradiation performance of the radiation, pellets of CaSO4:Eu,Ag were prepared, 1 mm thick and 5 mm in diameter.…”

Section: Methodsmentioning

confidence: 99%

Adaptation and security validation of an irradiator suitable for use of cesium-137 sources

Silva

Belinato

Santos

et al. 2014

EPJ Web of Conferences

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Abstract. With the aim of offering a new application for 137 Cs sources that were previously used in brachytherapy, we developed an irradiator for TL and OSL dosimeters by adapting a shielded storage container; this irradiator was named SOPHIA. It was assembled from a cubic iron casing, filled with lead, with external dimensions of 25 × 25 × 25 cm³. It has three different drawers with two sample holders suitable for samples or dosimeters with dimensions of up to 2 cm. Dose distribution of the surface of sample holder was obtained with EBT-3 radiochromic film and detectors thermoluminescent CaSO4: Dy. Regarding the security conditions of irradiation, the whole routine procedure for placement and removal of samples was simulated using Monte Carlo code. The equipment presented proper security conditions and the doses received by users during procedures for placement and extraction of the samples are in accordance with international standards.

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“…Yamashita et al (1968Yamashita et al ( ), (1971 developed a relatively simple and efficient method for doping CaSO 4 using rare earths. This method has been widely used and modified by various researchers (Ká sa et al, 2007;Yang et al, 2004;Junot et al, 2011).…”

Section: Introductionmentioning

confidence: 99%