Now showing items 1-9 of 9

    • Centers responsible for the TL peaks of willemite mineral estimated by EPR analysis 

      Rao, T. K. Gundu; Cano, Nilo F. [UNIFESP]; Silva-Carrera, Betzabel N.; Ferreira, Reinaldo M.; Javier-Ccallata, Henry S.; Watanabe, Shigueo (Elsevier Science Bv, 2016)
      The mineral willemite (Zn2SiO4) exhibits five thermoluminescence (TL) peaks approximately at 160, 225, 260, 310 and 400 degrees C. Electron paramagnetic resonance (EPR) studies were carried out to study the defect centers ...
    • Dating and determination of firing temperature of ancient potteries from São Paulo II archaeological site, Brazil by TL and EPR techniques 

      Cano, Nilo Francisco [UNIFESP]; Ribeiro, Rogerio B.; Munita, Casimiro S.; Watanabe, Shigueo; Neves, Eduardo G.; Tamanaha, Eduardo K. (Elsevier B.V., 2015-05-01)
      Pottery fragments from São Paulo II (SPII) archaeological site were dated by means of thermoluminescence (TL) and electron paramagnetic resonance (EPR). EPR was used to study the firing temperature using the iron signal ...
    • Dating stalagmite from Caverna do Diabo (Devil'S Cave) by TL and EPR techniques 

      Watanabe, Shigueo; Cano, Nilo Francisco [UNIFESP]; Gundu Rao, T. K.; Silva-Carrera, Betzabel N.; Carmo, Lucas S.; Quina, Antonio J. A.; Gennari, Roseli F.; Munita, Casimiro S.; Ayala-Arenas, Jorge S.; Fernandes, Bruno G. (Acad Brasileira De Ciencias, 2016)
      A cylindrical fragment of stalagmite from Caverna do Diabo, State of Sao Paulo, Brazil, has been studied and dated by thermoluminescence and electron paramagnetic resonance techniques. The thermoluminescence glow curves ...
    • High- and very-high-dose dosimetry using silicate minerals 

      Watanabe, Shigueo; Cano, Nilo Francisco [UNIFESP]; Carmo, Lucas S.; Barbosa, Renata de Faria [UNIFESP]; Chubaci, Jose F. D. (Elsevier B.V., 2015-01-01)
      In the present study, certain natural silicate minerals such as aquamarine (AB), morganite (PB), goshenite (WB), white jadeite (JW), green jadeite (JG), pink tourmaline (PT) and two varieties of jadeite-like quartz, denoted ...
    • OSL and EPR dating of pottery from the archaeological sites in Amazon Valley, Brazil 

      Cano, Nilo Francisco; Munita, Casimiro S.; Watanabe, Shigueo; Barbosa, Renata de Faria; Chubaci, Jose F. D.; Tatumi, Sonia Hatsue [UNIFESP]; Neves, Eduardo G. (Elsevier B.V., 2014-11-26)
      Pottery fragments from the Hatahara archaeological site, Amazon Valley, have been dated by thermoluminescence (TL), optically stimulated luminescence (OSL) and electron paramagnetic resonance (EPR) techniques. X-ray ...
    • Study of luminescence, color and paramagnetic centers properties of albite 

      Cano, Nilo Francisco [UNIFESP]; Santos, Lara H. E. dos; Chubaci, Jose F. D.; Watanabe, Shigueo (Elsevier B.V., 2015-02-25)
      A sample of natural albite, NaAlSi3O8, from the state of Minas Gerais, Brazil, has been investigated. the mineral is a solid solution of K-feldspar (4600 ppm - K) and Ca-feldspar (1100 ppm - Ca). the TL spectra of natural ...
    • Thermo luminescence in two varieties of jadeite: Irradiation effects and application to high dose dosimetry 

      Barbosa, Renata de Faria [UNIFESP]; Cano, Nilo Francisco [UNIFESP]; Watanabe, Shigueo; Guttler, Rainer A. S.; Reichmann, Fernando (Elsevier B.V., 2014-12-01)
      The thermoluminescence properties of white (WJ) and green (GJ) mineral jadeite have been investigated with a view to be of use in high dose dosimetry. WJ presented glow curve with 110,190 and 235 degrees C peaks. All these ...
    • Thermoluminescence and optical absorption properties of glass from natural diopside and of synthetic diopside glass 

      Fernandes, Bruno G.; Cano, Nilo F. [UNIFESP]; Rao, T. K. Gundu; Gouvea, Douglas; Padilha, Angelo F.; Ayala-Arenas, Jorge S.; Watanabe, Shigueo (Elsevier Science Bv, 2017)
      Glasses based on natural mineral diopside and synthetic glasses starting from Oxides of magnesium, calcium and silicon, and some of these glasses doped with 0.1, 1.0, 2.0 and 4.0% of Ag, have been produced for the study ...
    • Thermoluminescence in Lapis Lazuli crystal: Glow peaks and their connection with F-centers estimated by ESR analysis 

      Silva-Carrera, Noemi B.; Cano, Nilo F. [UNIFESP]; Gundu Rao, T. K.; Ayala-Arenas, Jorge S.; Watanabe, Shigueo (Elsevier Science Bv, 2017)
      The mineral Lapis Lazuli exhibits three thermoluminescence (TL) peaks approximately at 140, 260 and 370 degrees C. The TL intensity of the three peaks grows with radiation dose and it saturates only beyond 9 kGy. Electron ...