Now showing items 1-3 of 3

    • 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 ...
    • 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 ...
    • 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 ...