Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
권호 표지

Development of Phosphorus-compound $CaSO_4$ : Dy(KCT-300) TL Pellets

  • Published : 2002.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

CaSO$_4$:Dy thermoluminescence dosimeter (TLD) is widely used as a personal or environmental dosimeter because of its high sensitivity to radiation. There are many methods to make pellets from the TL phosphorss[l-5]. Sintered pellets were made from a mixture of CaSO$_4$:Dy phosphor and Teflon powder is the most common method. But this method has disadvantage that CaSO$_4$:Dy pellet does not have very high sensitivity because of large amounts of Teflon in Pellets. This Paper described development of a new type of CaSO$_4$:Dy pellets by using P- compounds as a bonding material (KCT-300), and compared the TL sensitivity with that of the commercialized Teledyne CaSO$_4$: Dy pellets. Sensitivity of a new developed KCT-300 shows about 6 times than Teledyne ones, and can be used to measure very low radiation dose.

Keywords

References

  1. G.A.M.Webb, J.E.Dauch and G.Bodin, Operational evaluation of a new high sensitivity thermoluminescent dosimeter. Health Phys. 23. 89-94(1972)
  2. S.S.Shastry, S.S.Shinde and R.C.Bhatt. Thermoluminescence response of $CaSO_4$:Dysintered pellets. Int. J.Appl.Radiat.Isot 31, 244-245(1980) https://doi.org/10.1016/0020-708X(80)90115-5
  3. S.P.Morata, M.P.Gordon, E.N.D.Santos, L.Gomes, L.L.Campos, L.Prado, M.M.Vieira and V.N.Bapat. Development of a state dosimetry based on thermoluminescent $CaSO_4$ crystals. Nucl. Instrum. Methods. 200, 449-455(1982) https://doi.org/10.1016/0167-5087(82)90469-0
  4. J.Azofin, A.Gutierrez and T.Niewiadomski, Performance tests of a $CaSO_4$:Dy based thermoluminescence personal dosimeter, Radiat. Prot. Dosim. 17, 53-56(1986)
  5. M.Prokic. Thermoluminescent characteristics of calsium sulphate solid detectors. Radiat. Prot. Dosim.37, 271-274(1991)
  6. T.Yamashita, N.Nacla, H. Onishi and S.Kitamura. Calsium sulphate activated by thulium or dysprosium for thermoluminescene dosimetry. Health Phys. 21, 295-300(1971)