New Dosimetry System 2002 (DS02) and its Background

Abstract

  Dosimetry system 2002 (DS02) has been established recently according to the collaboration among many institutions and universities in US, Japan and Germany. DS02 calculates organ doses of atomic bomb survivors. At first emitted neutron and gamma-ray spectra from the Hiroshima and Nagasaki atomic bombs were obtained, which were used to calculate air transport, absorption and transmission through Japanese houses. Finally organ doses of each atomic bomb survivor were obtained. This DS02 was compared with measured data and its accuracy was verified. These doses will be combined with the epidemiological studies of the Radiation Effects Research Foundation and radiation risks will be obtained. The risks will be used to limit exposure for radiation workers and also for general people. The major part of the radiation of DS02 is gamma rays, which increased about 10% both in Hiroshima and Nagasaki comparing with the former DS86. In this paper obtained results of DS02 and the back ground of the construction of DS02 are shown.