Abstract
Dosimetry system for atomic bomb radiation; DS86 issued in 1986 had been discussed for log years. There exist discrepancies of measured residual activities and calculations at the short- and also long-ranges. From 2000, Japan and US joint workshop has been held, and reassessment was started to improve the dosimetry system. As the results of the works, consensus was obtained for the evaluations, and the new dosimetry system DS02 has been issued through the senner committee. In the DS02, higher cpu machine (~10Tflops) has been used for calculations, and precise calculation of which calculating memory increased to about 100 times, has been performed. And also, the cross section data libraries were improved from ENDF/B5 to the newer ENDF/B6.2. The burst height and output of the atomic bomb are re-evaluated using the calculation results and the measurement data. As the results of this evaluations, differences between DS86 and DS02 are shown to be less than 20%. However, the reproducibility of the measured data, especially at the short range, is quite improved. Some comparisons of DS02 with DS86 will be presented in this talk. [J Radiat Res 44:384 (2003)]
