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Márquez-Mata CA, Vega-Carrillo HR, Mata Chávez MJ, de Jesús Araiza-Ibarra J, Ortega-Sígala JJ, Escalona Llaguno MI, García-Duran Á. Characterization of six types of Mexican Onyx. Appl Radiat Isot 2019; 146:139-144. [PMID: 30826494 DOI: 10.1016/j.apradiso.2019.01.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 11/25/2022]
Abstract
Optical, chemical, and radiation shielding characteristics of 6 types of Mexican onyx from the semi-desert of Zacatecas have been determined. Onyx samples are Yellow, Blue, Brown, Orange, Red and Green. Characterization was carried out using Energy dispersed X-Ray fluorescence, Visible Ultraviolet Spectrometry and Infrared Spectroscopy. With these techniques it was possible to study the chemical, physical and optical characteristics of the Mexican Onyx; from where the elemental composition was obtained, the absorption peaks, the vibrational modes and the optical band gap. As well as the interactions of these materials with radiation was studied. From this last study we obtained the Mass interaction coefficient for the coherent and incoherent dispersion, the photoelectric effect, the Compton scattering and the pair production, in the atomic nucleus and the electron field. For all types of onyx the total mass attenuation coefficients are alike showing a resonance due to K-shell of Ca. Mexican onyx has a good shielding features to photons of energy less than 100 keV because the most probable event is the photoelectric effect.
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Affiliation(s)
- Claudia Angélica Márquez-Mata
- Unidad Académica de Estudios Nucleares de la Universidad Autónoma de Zacatecas, Cipres 10, Fracc. La Peñuela, 98060, Zacatecas, Zac, Mexico.
| | - Hector Rene Vega-Carrillo
- Unidad Académica de Estudios Nucleares de la Universidad Autónoma de Zacatecas, Cipres 10, Fracc. La Peñuela, 98060, Zacatecas, Zac, Mexico
| | - Ma Jesús Mata Chávez
- Unidad Académica de Ciencias de la Tierra de la Universidad Autónoma de Zacatecas, Av. Universidad 108, Col. Progreso, 98050, Zacatecas, Zac, Mexico
| | - José de Jesús Araiza-Ibarra
- Unidad Académica de Física de la Universidad Autónoma de Zacatecas, Paseo a la Bufa s/n Campus Universitario II, 98600, Zacatecas, Zac, Mexico
| | - José Juan Ortega-Sígala
- Unidad Académica de Física de la Universidad Autónoma de Zacatecas, Paseo a la Bufa s/n Campus Universitario II, 98600, Zacatecas, Zac, Mexico
| | - Martha Isabel Escalona Llaguno
- Unidad Académica de Estudios Nucleares de la Universidad Autónoma de Zacatecas, Cipres 10, Fracc. La Peñuela, 98060, Zacatecas, Zac, Mexico
| | - Ángel García-Duran
- Unidad Académica de Estudios Nucleares de la Universidad Autónoma de Zacatecas, Cipres 10, Fracc. La Peñuela, 98060, Zacatecas, Zac, Mexico
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Determination of thermoluminescence kinetic parameters of white and blue chalcedony exposed to X-ray irradiation. Radiat Phys Chem Oxf Engl 1993 2018. [DOI: 10.1016/j.radphyschem.2018.05.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kortov V, Pustovarov V, Shtang T. Defect evolution and photoluminescence in anion-defective alumina single crystals exposed to high doses of gamma-rays. RADIAT MEAS 2016. [DOI: 10.1016/j.radmeas.2015.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Watanabe S, Cano NF, Gundu Rao TK, Oliveira LM, Carmo LS, Chubaci JFD. Radiation dosimetry using decreasing TL intensity in a few variety of silicate crystals. Appl Radiat Isot 2015; 105:119-122. [PMID: 26277189 DOI: 10.1016/j.apradiso.2015.07.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 07/21/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
This study shows that there are some ionic crystals which after irradiation with high gamma dose Dm and subsequent irradiation with low doses ranging up to 500Gy present a decreasing TL intensity as dose increases. This interesting feature can be used as a calibration curve in radiation dosimetry. Such behavior can be found in green quartz, three varieties of beryl and pink tourmaline. In all these silicate crystals it can be shown that irradiation with increasing γ-dose there is a dose Dm for which the TL intensity is maximum. Of course, Dm varies depending on the crystal and irradiated crystal with the dose Dm is stable. If one of these crystals is taken and irradiated with doses from low values up to 400-500Gy, a curve of decreasing TL intensity is obtained; such a curve can be used as a calibration curve.
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Affiliation(s)
- Shigueo Watanabe
- Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Nilo F Cano
- Departamento de Ciências do Mar, Universidade Federal de São Paulo, Campus Baixada Santista, Santos, SP, Brazil.
| | - T K Gundu Rao
- Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil
| | | | - Lucas S Carmo
- Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Jose F D Chubaci
- Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil
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Dogan T, Toktamış H, Yüksel M, Topaksu M, Necmeddin Yazici A. Thermoluminescence glow curve analysis of natural onyx from Turkey. Appl Radiat Isot 2015; 96:13-19. [DOI: 10.1016/j.apradiso.2014.10.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 10/09/2014] [Accepted: 10/20/2014] [Indexed: 10/24/2022]
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Watanabe S, Cano NF, Carmo LS, Barbosa RF, Chubaci JF. High- and very-high-dose dosimetry using silicate minerals. RADIAT MEAS 2015. [DOI: 10.1016/j.radmeas.2014.11.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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