Nanocrystalline Ba{sub 0.97}Ca{sub 0.03}SO{sub 4}:Eu for ion beams dosimetry
- Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi-110067 (India)
- Center of Nanotechnology, King Abdulaziz University, Jeddah-21589 (Saudi Arabia)
- Radiotherapy Department, Safdarjung Hospital, New Delhi-110029 (India)
- Department of Physics and Astrophysics, University of Delhi, Delhi-110007 (India)
- Joint Institute for Nuclear Research, Dubna 141980 (Russian Federation)
- P. N. Lebedev Physical Institute, Russian Academy of Sciences, Leninsky Prosp. 53, Moscow 117924 (Russian Federation)
- Department of Physics, Sri Venkateswara College, University of Delhi, Benito Juarez Road, Dhaula Kuan, New Delhi-110021 (India)
Nanoparticles of Ba{sub 0.97}Ca{sub 0.03}SO{sub 4}:Eu have been irradiated by 48 MeV Li{sup 3+}, 75 MeV C{sup 6+}, and 90 MeV O{sup 7+} ion beams with a fluence range of 1x10{sup 9}-1x10{sup 13} ion/cm{sup 2}. The thermoluminescence (TL) glow curves along with the response curves of this nanophosphor have been investigated and compared with those of the corresponding microcrystalline samples. TL glow curve of the nanophosphor exposed to {gamma}-rays has also been included in the letter with the aim of reporting some of the comparative measurements. The glow curves of the ion-beam irradiated nanomaterials are similar in their shapes to those induced by gamma rays, with a shift in the peak positions to the higher temperature side by around 30 K. The TL intensity of the ion-beam irradiated nanomaterials is found to decrease, while going from low to high atomic number (Z) ions (i.e., Li{sup 3+}{yields}O{sup 7+}). Similar trend was also observed in the linearity of the TL response curves. The response curve of Li ion irradiated nanomaterials is sublinear in the whole range of studied fluences. C ion has also a more or less similar response, while the O ion has a sublinear response over a shorter range of 1x10{sup 9}-1x10{sup 12} ion/cm{sup 2}, and above this range the response saturates. These results for the nanomaterials are much better than that of the corresponding microcrystalline sample irradiated by Li{sup 3+} ions. The curve was sublinear up to the fluence 1x10{sup 10} ion/cm{sup 2} and then saturates at higher fluences. The wider sublinear TL response of the nanocrystalline Ba{sub 0.97}Ca{sub 0.03}SO{sub 4}:Eu makes it superior to its corresponding microform and thus makes it a suitable candidate as a dosimeter to be used for detecting the doses of ions, especially the Li and C ions for their application in cancer radiotherapy and radiation biology.
- OSTI ID:
- 21137422
- Journal Information:
- Journal of Applied Physics, Vol. 104, Issue 3; Other Information: DOI: 10.1063/1.2955459; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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