Ar. Lakshmanan et Mt. Jose, LOW-DOSE MEASUREMENTS WITH CASO4DY, CASO4TM AND CASO4DY TEFLON DOSIMETERS - A COMPARATIVE-STUDY, Radiation protection dosimetry, 46(3), 1993, pp. 181-187
Citations number
NO
Categorie Soggetti
Radiology,Nuclear Medicine & Medical Imaging","Nuclear Sciences & Tecnology
A comparative study of the low dose measurement capabilities of CaSO4:
Dy, CaSO4:Tm in powder form and CaSO4:Dv embedded Teflon discs was car
ried out. The detection threshold of CaSO4:Dy powder is lower than tha
t of Teflon discs because there is less spurious TL from powder and mo
st of it is removable with nitrogen flow. Preliminary studies indicate
that the spurious TL from CaSO4:Dy Teflon discs is higher and not ent
irely removable with nitrogen flow, which results in the overestimatio
n of radiation doses at low dose levels. Higher sensitivity and other
desirable dosimetric properties of CaSO4:Tm made in Hungary, such as r
educed intensity of the fast fading low temperature TL peak near 100-d
egrees-C and reduced spurious TL, are confirmed. The ratio of TL sensi
tivities of CaSO4:Tm (Hungary), CaSO4:Dy (Hungary) and CaSO4:Dy (India
) is 1.5:1.26:1.0.