Evaluation of the dosimetric response for CaSO4:Dy at low temperature.
Homemade solid state CaSO4:Dy detectors were tested to evaluate their response to gamma radiation at liquid nitrogen temperature (77 K). The dosemeters were irradiated with doses between 12 and 1071 Gy. For this study these dosemeters were exposed to gamma rays with a dose rate of 1.19 Gy.min(-1). The analysis for these crystals was made by thermoluminiscence. The dose response at liquid nitrogen temperature was linear in the dose range studied and it is about 20% lower with respect to the response at room temperature. The response is reproducible with the same geometric set-up.
Cruz-Zaragoza
E
E
Instituto de Ciencias Nucleares, UNAM, México, DF México. ecruz@nuclecu.unam.mx
Ramos-Bernal
S
S
Negrón-Mendoza
A
A
Azoŕin
J
J
D002133:Calcium Sulfate / Q000737:chemistry / Q000528:radiation effects*; D004419:Dysprosium / Q000737:chemistry; D005720:Gamma Rays; D008163:Luminescent Measurements; D011854:Radiochemistry; D015203:Reproducibility of Results; D013696:Temperature; D013819:Thermoluminescent Dosimetry / Q000379:methods* / Q000706:statistics & numerical data
D004419:Dysprosium; D002133:Calcium Sulfate