A new ESR dosimeter based on bioglass material

The electron spin resonance (ESR) spectrum has been measured in X-ray-irradiated CdS-doped glass before heat treatment to examine the possibility of using such glass as a dosimetric material. No ESR signal is observed before X-ray irradiation, but it was observed after X-ray irradiation. The intensity of the ESR signal of the glass before heat treatment is higher than that after heat treatment. The thermal stability of the ESR signal of the former glass is slightly better than that of the latter. Therefore, the glass before heat treatment has better properties than that after heat treatment.

show abstract

“…Recently, Hassan et al 1) reported that bioglass (45% SiO 2 , 24.5% CaO, 24.5% Na 2 O, and 6% P 2 O 5 )…”

mentioning

confidence: 99%

Electron Spin Resonance of X-ray-Irradiated CdS-Doped Glass before Heat Treatment

Miyoshi

Migita

Tamechika

et al. 2009

jjap

View full text Add to dashboard Cite

show abstract

“…However, the sensitivity of alanine dosimeters is low: the lower limit is approximately 10 Gy. In recent years, Hassan et al 1) have reported that bioglass (45% SiO 2 , 24.5% CaO, 24.5% Na 2 O, and 6% P 2 O 5 ) was tenfold more sensitive than commercial alanine dosimeters. In a previous paper, 2) we reported that an ESR signal was observed in X-ray irradiated CdS-doped glass, which contains CdS nanocrystals in silicate glass.…”

mentioning

confidence: 99%

CdS-Doped Glass as Dosimetric Material with Electron Spin Resonance

Miyoshi¹,

Migita²,

Tamechika³

et al. 2006

jjap

View full text Add to dashboard Cite

Electron spin resonance (ESR) spectra have been measured in X-ray-irradiated CdS doped glass as functions of X-ray dose and effective X-ray energy. The intensity of the ESR signal is proportional to X-ray dose up to 40Gy. CdS-doped glass is more sensitive than a commercial alanine dosimeter. The intensity of the ESR signal decreases with decreasing effective X-ray energy for energies lower than 33 keV. Thermal stability was also studied.The ESR signal is relatively stable at room temperature. *

show abstract

“…The dosimetric property has typically been reported using spectrophotometry, ESR, and TL (Caldas and Quezada, 2002;Caldas and Teixeira, 2002;Dogan and Tugrul, 2001;El-Ati and Higazy, 2000;Engin et al, 2006;Gancheva et al, 2006;Hassan et al, 2004;Khan and Ali, 1995;Kim et al, 2004;Quezada and Caldas, 1999;Rodrigues and Caldas, 2002;Teixeira et al, 2005;Zheng et al, 1997) and the sensitivity of the instruments was compared Teixeira and Caldas, 2002). In this study, dosimetric property of commercial glass was confirmed and compared using colorimetry, spectrophotometry, and ESR.…”

Section: Dosimetric Property Measured By Colorimeter Uv-vis Spectropmentioning

confidence: 62%

“…Glass has the advantages of chemical inertness, insolubility, rigidity, and small size, as well as other common requirements of dosimetric systems. The response of glass after ionizing irradiation has been observed by UV-Vis spectroscopy, ESR, TL, and other instrumentation (Caldas and Quezada, 2002;Caldas and Teixeira, 2002;Engin et al, 2006;Gancheva et al, 2006;Hassan et al, 2004;Khan and Ali, 1995;Quezada and Caldas, 1999;Rodrigues and Caldas, 2002;Teixeira et al, 2005;Zheng et al, 1997). Gamma irradiation leads to darkening of glass.…”

Section: Introductionmentioning

confidence: 99%