Nemec H W, Roth J, Lüthy H
Strahlentherapie. 1975 May;149(5):493-8.
A combination of two different modifications indicated in the literature about the ferrosulfate dosimetry has been given. This permits a dose measurement which shows compared to the usual dosimetry of Fricke above all following advantages: dose specification related to water; displacement of the absorption maximum in the perceptible spectral sphere; increase of the sensibility and lower influence of pollutions. The molar coefficient of extinction of the modified solution has been determined from Co-60-gamma irradiation and is epsilonm = 1,46 - 10(4) L - Mol(-1) - cm(-1). The increase of extinction which has been measured with this method after the irradiation with 18 MeV electrons occurs linearly within the studied region to 1200 rd at least, the G-value is 15,5. The indicated method renders possible a relative simple calibration of the ionisation chambers which have been used in the practice.
给出了文献中关于硫酸亚铁剂量测定法的两种不同修正方法的组合。这使得剂量测量成为可能，与弗里克常规剂量测定法相比，它具有以下主要优点：与水相关的剂量规格；在可见光谱范围内吸收最大值的位移；灵敏度的提高以及污染影响的降低。通过钴 - 60γ 射线辐照确定了改性溶液的摩尔消光系数，其为 εm = 1.46×10⁴ L·mol⁻¹·cm⁻¹。用该方法在 18 MeV 电子辐照后测得的消光增加在至少 1200 拉德的研究区域内呈线性，G 值为 15.5。所指出的方法使实际中使用的电离室的相对简单校准成为可能。
