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

• Published in: Journal of alloys and compounds Vol. 735; pp. 1949 - 1954
• Main Authors: Nagabhushana, K.R., Prakash, D., Singh, Fouran, Tatumi, Sonia H., Rocca, Rene R., Watanabe, S.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 25.02.2018; Elsevier BV
• Subjects: Beta rays; Calcium; Calcium oxide; Gamma rays; Glow curves; Heavy ions; Ions; Kinetic parameters; Lime; Nanocrystals; Nanophosphors; Swift heavy ions; Thermoluminescence; Gamma rays; Swift heavy ions; Calcium oxide; Kinetic parameters; Beta rays; Thermoluminescence
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2017.11.148

Combustion synthesized nanocrystalline calcium oxide is irradiated with gamma rays, beta rays and swift heavy ions. TL glow curves of γ-irradiated samples show a prominent peak at 654 K with shoulder at 411 K. Whereas, β-irradiated samples exhibits two TL glows with peaks at 535 K and 570 K. TL glow peak intensity of β-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 × 107 to 2.85 × 109 s−1 respectively. •Calcium oxide exhibits different thermoluminescence properties for γ, β & swift heavy ion radiations.•TL mechanism of swift heavy ion irradiated sample differs from γ & β – irradiated samples.•TL kinetic parameters are calculated and compared for three different ionizing radiations.