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

Author(s)

Nagabhushana, K. R. ^{[1, 2, 3]} ; Prakash, D. ^{[3, 4]} ; Singh, Fouran ^[5] ; Tatumi, Sonia H. ^[1] ; Rocca, Rene R. ^[1] ; Watanabe, S. ^[6]

Affiliation

^[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

• Document type: Journal article
• Source: Journal of Alloys and Compounds; v. 735, p. 1949-1954, FEB 25 2018.
• Web of Science Citations: 3

Abstract

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)

• FAPESP's process: 16/02262-0 - TL and OSL dating and dosimetry applied to geological sites
• Grantee: Sonia Hatsue Tatumi
• Support type: Research Grants - Visiting Researcher Grant - International