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IJPAP Vol.50 [2012] >
IJPAP Vol.50(11) [November 2012] >
| Title: | Thermoluminescence and photoluminescence properties of K2Ca2(SO4)3:Cu nanophosphor for gamma radiation dosimetry |
| Authors: | Mandlik, Nandkumar
Bakare, J S
Sahare, P D
Bhoraskar, V N
Dhole, S D |
| Keywords: | Nanophosphor
Thermoluminescence
Photoluminescence |
| Issue Date: | Nov-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Nanocrytstalline K2Ca2(SO4)3:Cu
was synthesized by chemical co-precipitation method and annealed at 400°C. These nanocrytstalline samples were irradiated with gamma
radiation for the dose varying from 500 Gy to 2000 Gy. The pre and post
irradiated samples were characterized by the techniques such as XRD, SEM, UV,
FTIR, photoluminescence (PL) and thermoluminescence (TL). XRD spectra show the
orthorhombic structure and the crystallite size ~ 25 nm. The same is also
confirmed in SEM, where the size of nanoparticles was varied from 20 to 40 nm
and also shows monodispersed. Formation of the compound was also checked by
FTIR, where the S-O stretching and bending mode have been observed. Whereas, in
case of UV visible spectra, the band gap observed to be marginally decreased
with gamma dose. In PL spectra, the emission bands are observed at 403 and 419
nm, respectively and their respective intensity increases linearly with the
increase in gamma dose. In TL spectra, two dosimetric peaks have been observed
at 144°C and 287°C, respectively and their intensity tends to be increased with gamma
radiation dose. This particular aspect shows the wide range linear TL response
to the high gamma dose. Moreover, a significant shift in the peak towards lower
temperature has been observed. This indicates the disorganization of the
initial energy bands in the nanophosphor. In conclusion, the K2Ca2(SO4)3:Cu
nanophosphor is useful for high dose gamma ray dosimetry.
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| Page(s): | 859-862 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(11) [November 2012]
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