Novel etching protocol for epidote fission tracks

Autor(es)

Nakasuga, Wagner Massayuki ^{[1, 2]} ; Tello Saenz, Carlos Alberto ^[2] ; Campos Curvo, Eduardo Augusto ^[3] ; Hadler Neto, Julio Cesar ^[1] ; Guedes, Sandro ^[1] ; Resende, Rosana Silveira ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Phys Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

^[2] Sao Paulo State Univ, UNESP, Dept Phys Chem & Biol, BR-19060 Presidente Prudente City, SP - Brazil

^[3] Univ Fed Mato Grosso, UFMT, Inst Phys, BR-78060900 Cuiaba City, MT - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Radiation Measurements; v. 118, p. 26-30, NOV 2018.
• Citações Web of Science: 0

Resumo

Along the years, etching for fission tracks was a major issue in the development of the epidote fission track dating. It was not a consensus in the scientific community. As an attempt to mitigate it, we present a novel etching protocol (HF 40% at 15 degrees C for 80 min) and test it in ten different natural samples etched with HF 40% at 15 degrees C for 80 min (nine epidotes and one clinozoisite). The samples had their chemical compositions determined, forming a database for epidote chemical compositions. Fission tracks were observed in five samples. The uranium content in the remaining four samples was too low and hence tracks could not be observed. Further analyses, Raman and uranium concentration, confirm this observation. Fission tracks were not observed in clinozoisite sample. The proposed etching protocol showed to be less hazardous and efficient to etching fission tracks in epidote. (AU)

• Processo FAPESP: 10/20496-2 - Caracterização de Epídotos via MEV, Espectroscopia Micro-Raman, Calorimetria Diferencial de Varredura e Microscopia Ótica e estudos de annealing e entropia através do Método dos Traços de Fissão
• Beneficiário: Wagner Massayuki Nakasuga
• Modalidade de apoio: Bolsas no Brasil - Doutorado