ESR response to 60Co-rays of ammonium tartrate pellets using as additive
2007; Elsevier BV; Volume: 42; Issue: 2 Linguagem: Inglês
10.1016/j.radmeas.2007.01.035
ISSN1879-0925
AutoresM. Brai, G. Gennaro, Maurizio Marrale, Luigi Tranchina, A. Bartolotta, Maria Cristina D’Oca,
Tópico(s)Thermal and Kinetic Analysis
ResumoThis work presents experimental results regarding a new ammonium tartrate blend for ESR dosimetry, with a higher sensitivity and a lower lowest detectable dose (LDD) to Co60 γ-rays than the recently used pure ammonium tartrate. The blend composed by ammonium tartrate and gadolinium-oxide (Gd2O3) shows a greater sensitivity (∼2 times) and a smaller LDD than ammonium tartrate. The increased sensitivity was mainly attributed to the great atomic number (Z=64) of gadolinium, that increases the effective atomic number of the blend; the interaction probability with photons and consequently the radical yield is therefore enhanced. Moreover ammonium tartrate with Gd2O3 has a linear dose response in the investigated dose range (1–50 Gy). We find this blend suitable for use in ESR dosimetry.
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