Stinchcomb T G, Kuchnir F T, Skaggs L S
Phys Med Biol. 1980 Jan;25(1):51-64. doi: 10.1088/0031-9155/25/1/005.
Microdosimetric measurements of event-size spectra, made with a proportional counter, are being used increasingly for separation of dose components in mixed n-gamma fields. Measurements in fields produced by 8.3 MeV deuteron bombardment of thick beryllium and deuterium targets were made in air and at 6 and 12 cm depth in water with a spherical tissue-equivalent (TE) proportional counter and with a pair of calibrated ion chambers (TE-TE and Mg-Ar). The dose results obtained with the two methods agree well for the neutron components, but the gamma components do not demonstrate consistent agreement. An important source of error in the microdosimetric method is the matching of the spectra measured at different gain settings to cover the large range of event sizes. The effect of this and other sources of error is analysed.
用正比计数器进行的事件大小谱微剂量测量，越来越多地用于分离混合中子 - 伽马场中的剂量成分。使用球形组织等效（TE）正比计数器和一对校准的电离室（TE - TE和Mg - Ar），在空气中以及在水的6厘米和12厘米深度处，对8.3兆电子伏特氘核轰击厚铍靶和氘靶产生的场进行了测量。两种方法获得的中子成分剂量结果吻合良好，但伽马成分的结果并不一致。微剂量方法中一个重要的误差来源是在不同增益设置下测量的谱的匹配，以覆盖大范围的事件大小。分析了这种误差来源和其他误差来源的影响。
