Radiation Technology Center, Atomic Energy Research Institute, King Abdulaziz City for Science and Technology, Riyadh, KSA 11442, Saudi Arabia.
Phys Med. 2013 Jun;29(4):374-8. doi: 10.1016/j.ejmp.2012.05.006. Epub 2012 Jun 15.
Nitro blue tetrazolium (NBT) solution dosimeters were prepared and investigated based on radiation-induced reduction of NBT(2+). NBT solution dosimeters containing different concentrations of NBT dye from 1 to 5 mM were prepared in a solution of ethanol. The dosimeters were irradiated with 6 MV X-ray beam at doses up to 30 Gy. The dose sensitivity of NBT solution increases strongly with increase of concentrations of NBT dye. The dose response of NBT dosimeters increases remarkably by addition of various concentrations of sodium formate (0.5, 2.5 and 5 mM). It becomes more remarkable with increasing pH value of NBT-sodium formate dosimeters. The sensitivity of the solution increased fairly with increase of irradiation temperature, therefore, the response of the solutions has to be corrected under actual processing conditions. The stability of solution dosimeters after irradiation was very high up to 30 days.
硝基蓝四唑（NBT）溶液剂量计是基于 NBT(2+) 的辐射诱导还原而制备和研究的。在乙醇溶液中制备了含有不同浓度 NBT 染料（从 1 至 5 mM）的 NBT 溶液剂量计。将剂量计用 6 MV X 射线照射，剂量高达 30 Gy。NBT 溶液剂量计的剂量灵敏度随 NBT 染料浓度的增加而强烈增加。通过添加各种浓度的甲酸钠（0.5、2.5 和 5 mM），NBT 剂量计的剂量响应显著增加。随着 NBT-甲酸钠剂量计 pH 值的增加，其变得更加显著。溶液的灵敏度随辐照温度的升高而相当增加，因此，必须在实际处理条件下校正溶液的响应。辐照后溶液剂量计的稳定性非常高，可达 30 天。
