Unity Energy Response Using CaSO4:DY/Teflon

  • Maan S. Al-Arif Department of Physics, Faculty of Science and Health, Koya University, Koya University, University Park, Danielle Mitterrand Boulevard, Koya KOY45, Kurdistan Region.
Keywords: Cavity Theory, Energy Response, Particle Size, Photon Energy


This study investigates the possibility of achieving unity energy response using the very sensitive CaSO4:Dy/Teflon thermoluminescent detector at photon energies below 100 keV. Accurate measurements for the energy responses were carried-out using ultra thin, 3 micron thick, TLD discs with average grain size of about 3μm. The present work shows that the experimental reduction factor for the 15 % phosphor loading with average grain size of 3 μm is in good agreement with the calculation based on the cavity theory but at grain size of 1.0 μm. This indicates that the cavity theory is underestimating the real experimental reduction factor in the energy response. The present work expect that unity energy response can be achieved with grain size of about 1 μm.


Download data is not yet available.

Author Biography

Maan S. Al-Arif, Department of Physics, Faculty of Science and Health, Koya University, Koya University, University Park, Danielle Mitterrand Boulevard, Koya KOY45, Kurdistan Region.
Department of Physics, Faculty of Science and Health.


Chan, F.K. and Burlin, T.E., 1970. The Energy-size Dependence of the Response of Thermoluminescent Dosimeters to Photon Irradiation. Health Phys., 18(4), pp.325-32.

Carlson, G.A., Lorence, L., Vehar, D.W. and Klingler, R.S., 1990. Particle size effect in CaF2:Mn/Teflon TLD response at photon energies from 5-1250 keV. Nuclear Science, IEEE Transactions on , 37(5), pp.1560-1563

Driscoll, C.M.H. and McKinlay, A.F., 1981. Particle size effects in thermoluminescent lithium Fluoride. Phys. Med. Biol., 26(2), pp.321-327.

Hemandez, L., Rivera, T., Jimenez, Y., Alvarez, R., Zeferino, J., Vazquez, A. and Azorin, J., 2012. Thermoluminescent response of CaSO4:Dy+PTFE induced by X-ray beams. Appl. Rad. Isotopes, 70 (7), pp.1307-1309.

Kasa, I., 1990. Dependence of TL response of CaSO4:Dy and CaSO4:Tm TL phosphor on grain size and activator concentration. Radiat. Prot. Dosimetry, 33, pp.299-302.

Karali, C.N., Wang, T., Townsend, Y., Prokic, P.D. and Canimoglu, M., A., 2009. Room and low temperature luminescence properties of CaSO4:Dy,Tm codoped with Li. Physics Procedia, 2(2), pp.459-466.

Olko, P., Bilski, P., El-Faramawy, NA., Göksu, HY., Kim, JL., Kopec, R. and Waligórski, MP., 2006. On the relationship between dose-, energy- and LET-response of thermoluminescent detectors. Radiation Protection Dosimetry, 119(1- 4), pp.15-22.

Pradhan, A. S. and Bhatt, R. C., 1979. Effects of phosphor proportion and grain size on photon energy response of CaSO4: Dy teflon TLD discs. Nuclear Instruments and Methods, 161, pp.243-245.

Pradhan, A. S. and Bhatt, R. C., 1982. Response of Sensitised CaSO4:Dy Phosphor and Phosphor Embedded Teflon TLD Discs to X and Gamma Rays. Rad. Prot. Dosimetry, 2, pp.23-26.

Silva, H., 1989. The effect of grain size and teflon matrix on the energy dependence of thermoluminescent dosimeters. Int. J. Rad. Applications and Instrumentation, 40, pp.109-116.

How to Cite
Al-Arif, M. S. (2013) “Unity Energy Response Using CaSO4:DY/Teflon”, ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY, 1(1), pp. 14-16. doi: 10.14500/aro.10026.