Iborra-Brassart N, Vynckier S, Herault J, Chauvel P
Cyclotron Biomédical, Centre Antoine Lacassagne, Nice, France.
Bull Cancer Radiother. 1996;83 Suppl:153s-6s. doi: 10.1016/0924-4212(96)84902-4.
Neutron dosimetry intercomparison studies have been undertaken at the Nice neutrontherapy facility with the staff at Louvain-la-Neuve which has had wide experience in both dosimetric and radiobiological intercomparisons. Tissue equivalent (TE) ionization chambers were first calibrated in 60Co beams and then exposed in the neutron beam at different depths in a water phantom; the largest difference observed in neutron beam measurements with all the chambers tested was 0.89%, and most of them agreed to within less than 0.5%. The gamma component at four depths was derived from measurements with Geiger-Müller counters; the results obtained with the two counters (Nice and Louvain-la-Neuve), expressed as a percentage of the total dose (neutron + gamma), agreed to within less than 0.03% and the value increased from 1.4 to 4.2% between 2 and 20 cm in depth.
在尼斯中子治疗设施与鲁汶拉新的工作人员开展了中子剂量学比对研究，鲁汶拉新在剂量学和放射生物学比对方面有着丰富经验。组织等效（TE）电离室首先在钴 - 60束中进行校准，然后在水模体的不同深度处的中子束中进行照射；在所有测试的电离室的中子束测量中观察到的最大差异为0.89%，并且大多数电离室的测量结果在小于0.5%的范围内相符。在四个深度处的γ分量是通过盖革 - 米勒计数器的测量得出的；用两个计数器（尼斯和鲁汶拉新）获得的结果，以总剂量（中子+γ）的百分比表示，在小于0.03%的范围内相符，并且该值在深度2至20厘米之间从1.4%增加到4.2%。
