1
|
Alonso Sotolongo A, RIvera Montalvo T, Nolasco Altamirano D, López-Luke T, Contreras García ME, Zárate Medina J. Thermoluminescent glow curve of Gd 1-xRE xAlO 3 (RE=Dy or Pr) beta irradiated phosphors. Appl Radiat Isot 2023; 201:111019. [PMID: 37725890 DOI: 10.1016/j.apradiso.2023.111019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 08/15/2023] [Accepted: 09/05/2023] [Indexed: 09/21/2023]
Abstract
Phosphors composed of Gd1-xRExAlO3 (0≤x ≤ 5 RE = Dy or Pr) stoichiometries were synthesized using the reverse coprecipitation pathway. The thermoluminescent responses of all phosphors were studied under beta radiation exposure. Doping the gadolinium aluminate host improved the thermoluminescent response of the phosphors, with the phosphors composed of Gd0.99Dy0.01AlO3 and Gd0.95Pr0.05AlO3 being the most sensitive. The Dy3+ ions produced a higher improvement of the thermoluminescent signal than the Pr3+ ions. Additionally, a proportional relationship between the similarity of the atomic numbers of the dopant and replaced ions and the sensitivity to thermoluminescence was confirmed. Besides, a slight shift of the thermoluminescent peaks toward lower temperatures was detected for doped phosphors. In the repeatability tests applied to the phosphor composed of Gd0.99Dy0.01AlO3, an anomalous increase in sensitization was observed. The observed sensitization was associated with the formation of electron trap clusters resulting from the continuous exposure to beta radiation. Furthermore, another sensitization phenomenon was detected in the phosphor with Gd0.95Pr0.05AlO3 stoichiometry when it was heated at low temperatures. The aforementioned striking behavior was related to quasi-continuous distributions of electron traps and the tunneling effect. In regard to linearity, the phosphor composed of Gd0.99Dy0.01AlO3 exhibited a linear response with the dose across the entire range of beta doses. However, the response of the Gd0.95Pr0.05AlO3 phosphor lost linearity beyond 26.4 Gy of beta dose. The results obtained through the use of the Tmax-Tstop method and deconvolutions suggested an enhancement in the efficiency of the thermoluminescent mechanisms due to the incorporation of activators.
Collapse
Affiliation(s)
- Alejandro Alonso Sotolongo
- Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Edif. "U", C.U., Morelia, 58060, Michoacan, Mexico.
| | - Teodoro RIvera Montalvo
- Instituto Politécnico Nacional, CICATA-Legaria, Legaria 694, Mexico City, 11500, Mexico City, Mexico.
| | - Daniel Nolasco Altamirano
- Instituto Politécnico Nacional, CICATA-Legaria, Legaria 694, Mexico City, 11500, Mexico City, Mexico.
| | - Tzarara López-Luke
- Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Edif. "U", C.U., Morelia, 58060, Michoacan, Mexico.
| | - María Eugenia Contreras García
- Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Edif. "U", C.U., Morelia, 58060, Michoacan, Mexico.
| | - Juan Zárate Medina
- Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Edif. "U", C.U., Morelia, 58060, Michoacan, Mexico.
| |
Collapse
|
2
|
Joseph TA, Chopra V, Dhoble SJ. Thermoluminescence studies of zinc borate (ZnB 2 O 4 ) phosphor doped with rare earths for dosimetric aspects. LUMINESCENCE 2023; 38:1597-1606. [PMID: 37325972 DOI: 10.1002/bio.4542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/30/2023] [Accepted: 06/13/2023] [Indexed: 06/17/2023]
Abstract
A series of ZnB2 O4 phosphors doped with different concentrations of Eu and Dy (0.05 0.1, 0.2, 0.5, 1.0 mol%) and co-doped with Ce (1, 2, 5, 7, 10 mol%) respectively was prepared via the solid-state reaction technique and the thermoluminescence (TL) behaviour of gamma ray-irradiated samples was studied. The synthesized samples were irradiated with γ-rays for the dose range 0.03-1.20 kGy. The TL intensity variations with dose, dopant concentration, and the effect of co-doping were studied. The TL response curves for ZnB2 O4 :Eu3+ and ZnB2 O4 :Dy3+ , ZnB2 O4 :Eu3 ,Ce3+ and ZnB2 O4 :Dy3+ ,Ce3+ phosphor were observed. It was revealed that ZnB2 O4 :Eu3+ showed a linear TL behaviour for the dose 0.03-1.20 kGy and ZnB2 O4 :Dy3+ showed linearity for the gamma dose range 0.03-0.10 kGy. Furthermore, fading for all the samples was observed to be less than 10% for a storage period of 30 days. In addition to this, the trapping parameters, especially activation energies were evaluated using the Ilich method and the initial rise method. The activation energy values obtained from both methods were in complete agreement with each other.
Collapse
Affiliation(s)
- Tresa A Joseph
- Department of Physics, R.T.M. Nagpur University, Nagpur, India
| | - Vibha Chopra
- P.G. Department of Physics & Electronics, DAV College, Amritsar, Punjab, India
| | - Sanjay J Dhoble
- Department of Physics, R.T.M. Nagpur University, Nagpur, India
| |
Collapse
|
3
|
Sonsuz M, Topaksu M, Hakami J, Can N. Synthesis and thermoluminescence study of Eu doped novel LaBO3 phosphor: Heating rate, dose response, trapping parameters. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
|
4
|
First-principles study on persistent luminescence mechanism of LiYGeO4:Eu3+. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Thermoluminescence glow curve analysis of Ca3Y2B4O12 phosphor prepared using combustion method. Appl Radiat Isot 2022; 186:110299. [DOI: 10.1016/j.apradiso.2022.110299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 11/19/2022]
|
6
|
Thermoluminescent studies of GdAlO3 powders. Appl Radiat Isot 2022; 186:110268. [DOI: 10.1016/j.apradiso.2022.110268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 04/12/2022] [Accepted: 04/28/2022] [Indexed: 11/22/2022]
|
7
|
Randive K, Jawadand S, Dora ML, Kadam AR, Dhoble SJ. Tailoring of thermoluminescent properties and assessment of trapping parameters of natural fluorite samples from Dogargaon fluorite mines, India. LUMINESCENCE 2021; 36:1648-1657. [PMID: 34145942 DOI: 10.1002/bio.4107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 06/12/2021] [Accepted: 06/13/2021] [Indexed: 11/08/2022]
Abstract
Mineral fluorite or fluorspar (CaF2 ) can host significant quantities of trivalent REE3+ (rare earth element) by substitution with divalent Ca2+ . The fluorites associated with carbonatites are often REE-rich compared to those derived from sedimentary, hydrothermal, or Mississippi Valley-type (MVT) fluorites. The naturally occurring fluorites have several industrial applications one of which is for luminescence. Whether or not REE enriched, the fluorite makes an ideal host for REEs, which are very important phosphors. The naturally occurring fluorites are available in sufficient quantities to cater to the industrial demand. Investigations have been carried out on the fluorites from active fluorite mines at Dongargaon in central India. Thermoluminescence behavior of a natural fluorite sample was investigated using a Nucleonix TL 1009I thermoluminescence reader. Multiple traps formed in the broad thermoluminescent (TL) glow curve were found by TL anal deconvolution software. Trapping parameters for all multiple traps formed on deconvoluting broad TL glow curve were found by different methods like Initial rise method, Chen's Peak shape method and Ilich method.
Collapse
Affiliation(s)
| | | | - M L Dora
- Geological Survey of India, Central Region, Nagpur, India
| | | | - S J Dhoble
- Department of Physics, R.T.M. Nagpur University, Nagpur, India
| |
Collapse
|
8
|
Akça S. Determination of thermoluminescence properties of ZnB 2O 4:Tm 3+,Li + for dosimetric purposes. Appl Radiat Isot 2020; 157:109041. [PMID: 32063334 DOI: 10.1016/j.apradiso.2020.109041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/08/2020] [Accepted: 01/08/2020] [Indexed: 11/19/2022]
Abstract
This study aims to investigate the comparison of the thermoluminescence (TL) emission of Li+ and Tm3+ co-doped and un-doped zinc borate (ZnB2O4) phosphors prepared by wet chemical synthesis method. The crystal structure of the samples has been determined by means of X-ray powder diffraction and matched with the standard pattern of ZnB2O4 (PDF Card No. 039-1126). TL glow curves of 5 Gy beta irradiated Li+ (at different concentrations of 0.2, 0.5, 0.8 and 1.0%) and Tm3+ (1.0%) co-doped ZnB2O4 have been recorded using various band pass filters to determine both the optimum concentration and the suitable filter. The TL green emission (565 nm) of Li+ (1.0%), Tm3+ (1.0%) co-doped ZnB2O4 phosphor displays a complex structure where one can distinguish, at least, three groups of components peaked at 69, 166 and 291 °C where the more suitable dosimetric maxima appears at higher temperature. It could be observed how the 166 and 291 °C TL glow maxima of this material exhibits (i) good linearity in the range of 0.11-15 Gy, (ii) a minimum detectable dose value of 1.11 mGy, (iii) does not modify significantly the TL emission in shape and intensity after reusability (10 cycles) and (iv) a negligible fading effect for 5 Gy irradiated aliquots stored in darkness and room temperature up to 169 h. Additionally, it could be found that (v) kinetic parameters estimated by using variable heating rate method of Hoogenstraaten and initial rise method give similar results.
Collapse
Affiliation(s)
- Sibel Akça
- Cukurova University, Arts-Sciences Faculty, Physics Department, 01330, Adana, Turkey.
| |
Collapse
|
9
|
Abstract
In this work, structural and thermoluminescence (TL) characteristics for ZnB2O4:xTb3+ (x = 0.01, 0.02, 0.03, 0.04, 0.05, and 0.10 mole) phosphors were investigated. The phosphors were prepared via synthesis of nitric acid. The X-ray diffraction (XRD) studies show that the synthesized samples can be indexed to nearly single-phase cubic ZnB2O4. The TL characteristics following 90Sr beta irradiation (40 mCi) were studied. TL intensity is found to depend on Tb concentration. The optimal concentration of the doped Tb3+ is 0.03 mol in TL measurements. TL dose responses of the phosphors to beta doses of 0.143, 0.715, 1.43, 15, 30 and 60 Gy showed fairly linear behavior. The minimum detectable dose (MDD) value for ZnB2O4:0.04Tb3+ was found to be 87 mGy. The kinetic parameters of the ZnB2O4:0.03Tb3+ sample were estimated by the glow curve deconvolution, the initial rise, the curve fitting, and the peak shape methods. The results indicate that these phosphors are thought to be promising candidates as TL materials. The results provide valuable knowledge of the characteristics of Tb-doped ZnB2O4 for use in dosimetry research.
Collapse
|