丙氨酸自由基剂量计

辐射加工技术已在工农业生产中得到广泛的应用,但是适合于这种量程范围的较简易的剂量测量手段还较少。 固体丙氨酸粉末经过辐照后,产生稳定的长寿命丙氨酸自由基。Bradshaw等在六十年代用ESR(电子自旋共振)方法测定了辐照诱发的丙氨酸自由基,并用作剂量计,以后这

Alanine free radical dosimeter

The dosimeter with the dose range suitable for the radiation processing is few. This paper describes the alanine free radical dosimeter by chemical read-out. The irradiation alanine (50 mg) are dissolved in 10 ml of the solution containing 0.20mmol/l ferrous sulphate and 0.20 mmol/1 xylenol orange in 0.025 mol/1 sulphuric acid(FX). The absorbance of ferric-xylenol orange complex in the presence of alanine is measured at 540nm-550nm. The dose ranged from 200 Gy to 10 kGy can be measured. The dosimeter is quite stable for about one year after the irradiation. The technique is simple and accurate. The results are very good.