Taurine for EPR dosimetry

Abstract

EPR dosimetry is characterized by its non-destructive read-out and the possibility of dose archival. Here, taurine is proposed as a radiation dosimeter using EPR spectroscopy. The EPR spectrum of taurine was studied and assigned, and changes in the taurine EPR spectrum as a result of the change in both modulation amplitude and microwave power were quantified. For gamma radiation, the energy absorption coefficient and the collision mass stopping power of taurine were compared to the corresponding values of soft tissue and alanine, in addition to calculation of effective atomic numbers. The response of taurine to gamma radiation doses in the range from 0.1 to 50 kGy was investigated, as well as that in the range from 1.0 to 20.0 Gy using numerically enhanced EPR taurine spectra. Both response curves showed a linear behavior. In addition, the time dependence of radiation-induced radicals was studied for short (during the first 6 h after irradiation) and long (during about 3 months after irradiation) time periods, and a reasonable degree of stability of the taurine radicals was observed. It is concluded that taurine is a promising dosimeter, which is characterized by its simple spectrum, radical stability, and wide range of linear response to gamma radiation.

ESR dosimeter material properties of phenols compound exposed to radiotherapeutic electron beams

“…The tested materials (organic and inorganic) include ammonium tartrate, ammonium formate, taurine, potassium tartrate hemihydrate, lithium formate, dithionates, strontium carbonate, sodium tartrate dehydrate and strontium sulfate, hydroxyapatite, glass and some others [42][43][44][45][46][47][48][49][50][51][52][53][54]. Another methods followed to increase the sensitivity to various types of ionizing radiations is the addition of dopants such as gold, gadolinium, silver in small concentrations (to avoid the loss of tissue equivalence) [55][56][57][58][59][60][61][62][63].…”

Rapid scan electron paramagnetic resonance at 1.0 GHz of defect centers in γ-irradiated organic solids

“…Applications range from general radiation dosimetry (Eaton and Eaton, 2005; Ghim et al, 1996; Maghraby et al, 2012) and monitoring of food preservation (D’Oca and Bartolotta, 2011) to determining the nature of products of radiation chemistry (DeCooman et al, 2013). Most such studies have used continuous wave (CW) EPR and were performed at X-band (~9.5 GHz).…”