Dating of carbonate covering cave paintings at peruaçu, Brazil by TL and EPR methods

Watanabe, Shigueo; Cano, Nilo F.; Carvalho-Júnior, Alvaro B.; Ayala-Arenas, Jorge S.; Gonzales-Lorenzo, Carlos D.; Rao, T.K. Gundu

doi:10.1016/j.apradiso.2019.108847

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…Studies of the effects of heat treatment [8] and irradiation with different Ultraviolet (UV), beta and gamma sources on the TL response were also performed on limestones [9,10]. Determination of the kinetic parameters of the traps responsible for the TL peaks and studies on TL peaks deconvolution were carried out to understand the stability of the centers of samples used for luminescence dating, which is very important, since in dating, the sample must have stable peaks that remain for a few hundred up to million years [11][12][13] Calcite samples taken from caves, shells and limestone samples have also been successfully dated by TL in several other studies in the last decades [14][15][16][17][18] which emphasizes its role in the area.…”

Section: Introductionmentioning

confidence: 99%

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TL and OSL analysis of natural orange calcite crystal

almeida

Tatumi²,

Soares³

et al. 2022

Braz. J. Rad. Sci.

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The study presents TL and OSL characterization of orange calcite. It is known that calcite exhibits TL however its OSL emission is unwell studied. The morphological characterization was done by means of X-rays diffraction (XRD) technique and it was confirmed that the sample is a pure calcium carbonate. Total and traces elements were determined using Total Reflection X-Ray Fluorescence (TXRF) technique and several impurities were found as P (53070 mg/kg), S (877 mg/kg), K (442.1 mg/kg), Ca (118290 mg/kg), Fe (330.4 mg/kg), Cr (101.19 mg/kg), and Ni (115.01 mg/kg), also some trace impurities, as Cu (1.96 mg/kg) and Zn (1.30 mg/kg), Mn (57.21 mg/kg) were determined and they may have important role in the luminescent emission. Sample in powder form was irradiated with crescent doses of beta particles, in an interval of 5–25 Gy and showed TL peaks at approximately 93, 125, 162, 189 and 227 °C. An OSL response was verified and can be fitted using 3 components with decay constant values of 2.3, 10.0 and 77.4 s.

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Section: Introductionmentioning

confidence: 99%

“…Parameters obtained using a general equation for TL emission, recorded in UV region of orange calcite, Imax is the maximum intensity, Tm is peak temperature, Ea activation energy, b the kinetic order and s the frequency factor. ) 1.3x10 9 4.2x10 14 1.1x10 17 1.1x10 19 6.0x1018 …”

mentioning

confidence: 99%

TL and OSL analysis of natural orange calcite crystal

almeida

Tatumi²,

Soares³

et al. 2022

Braz. J. Rad. Sci.

View full text Add to dashboard Cite

show abstract

“…Para melhor visualização os difratogramas foram deslocados ao longo do eixo vertical. Os picos presentes na figura correspondem aos planos cristalinos da calcita natural e estão de acordo com os resultados de DRX encontrados por outros autores(SUITO et al, 2001;WATANABE et al, 2019; KALITA e CHITHAMBO, 2019).…”

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