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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Comparative studies on thermoluminescence glow curves of calcium oxide nanophosphor irradiated with various ionizing radiations

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Autor(es):
Nagabhushana, K. R. [1, 2, 3] ; Prakash, D. [3, 4] ; Singh, Fouran [5] ; Tatumi, Sonia H. [1] ; Rocca, Rene R. [1] ; Watanabe, S. [6]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Fed Sao Paulo, Inst Marine Sci, Campus Baixada Santista, BR-11030400 Santos, SP - Brazil
[2] PES Univ, Dept Phys S&H, BSK 3rd Stage, Bangalore 560085, Karnataka - India
[3] PES Inst Technol, Phys R&D Ctr, BSK 3rd Stage, Bangalore 560085, Karnataka - India
[4] Govt Sci Coll, Dept Phys, Bangalore 560001, Karnataka - India
[5] Inter Univ Accelerator Ctr, POB 10502, New Delhi 110067 - India
[6] Univ Sao Paulo, Inst Phys, BR-05508900 Sao Paulo, SP - Brazil
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Journal of Alloys and Compounds; v. 735, p. 1949-1954, FEB 25 2018.
Citações Web of Science: 3
Resumo

Combustion synthesized nanocrystalline calcium oxide is irradiated with gamma rays, beta rays and swift heavy ions. TL glow curves of gamma-irradiated samples show a prominent peak at 654 K with shoulder at 411 K. Whereas, beta-irradiated samples exhibits two TL glows with peaks at 535 K and 570 K. TL glow peak intensity of beta-irradiated samples increases linearly with increase in dose and position of glow peak temperature remains constant. TL of 120 MeV Au9+ ion irradiated sample show similar glow curve structure to that of gamma irradiated one. However, TL mechanism of ion irradiated sample differs from gamma irradiated one and it is discussed in the text. The TL curves are deconvoluted to calculate kinetic parameters. Activation energy and frequency factor are in the range 0.70 eV to 1.40 eV and 4.49-10(7) to 2.85-10(9) s(-1) respectively. (C) 2017 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 16/02262-0 - Datação e dosimetria de sítios geológicos por TL e LOE
Beneficiário:Sonia Hatsue Tatumi
Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional