Multidisciplinary and Interdisciplinary (M)
Session Sub-category Applied Geosciences(AG)
Session ID M-AG33
Title Basic study on the estimation of the "Black Rain" area caused by the atomic bomb
Short Title Basic study on the "Black Rain"
Main Convener Name Yasuhito Igarashi
Affiliation Institute for Integrated Radiation and Nuclear Science, Kyoto University
Co-Convener 1 Name Satoru Endo
Affiliation Graduate School of Advanced Science and Engineering, Hiroshima University
Co-Convener 2 Name Sumi Yokoyama
Affiliation Nagasaki University
Co-Convener 3 Name Hirohiko Ishikawa
Affiliation Institute for Integrated Radiation and Nuclear Science, Kyoto University
Session Language 
J
Scope 
The social debate on the extent of the area of deposition of radioactive fallout from the 1945 atomic bombings of Hiroshima and Nagasaki, the so-called "Black Rain" area, has been continuing. In this session, we will present an overview of the research study that has been conducted since January 2021 toward more accurate estimation of the area, as well as the results obtained. This research has been conducted in two main parts: (1) construction and calculation of simulation models, and (2) measurement of radioactive and trace materials, which is mainly soil survey to obtain the validation data.
Presentation Format Oral and Poster presentation
Invited Authors Mathew Paris Johansen (Australian Nuclear Science and Technology Organisation)
Time Presentation No Title Presenter
Oral Presentation May 31 PM1
13:45 - 14:00 MAG33-01 Fundamental study of assessing the area of the "Black Rain" caused by the atomic bombing of Hiroshima and Nagasaki Yasuhito Igarashi
14:00 - 14:15 MAG33-02 Evaluation of alteration of soil samples using depth distribution and inventory of radionuclides in soil Hiroshi Yashima
14:15 - 14:30 MAG33-03 Analysis of charcoal fragments in soils from Black Rain areas (Preliminary) Jun Inoue
14:30 - 14:45 MAG33-04 Development of Microarea Imaging Method for Isotopes on Cross-section of Morten Particles Collected in Hiroshima Tetsuo Sakamoto
Oral Presentation May 31 PM2
15:30 - 15:45 MAG33-05 Characteristics of radioactive particles from 1950s nuclear testing legacy sites in Australia Mathew Paris Johansen
15:45 - 16:00 MAG33-06 Numerical Realization of the ‘Black-Rain’ event associated with Hiroshima Nuclear Bombing Hirohiko Ishikawa
16:00 - 16:15 MAG33-07 Numerical Model Construction for "Black-Rain" Reproduction Run Kunio Takahashi
16:15 - 16:30 MAG33-08 Assessment of the Atmospheric Environment and Precipitation at the Time of the Atomic Bombing of Hiroshima
– Based on meteorological data rescue – 		Akiyo Yatagai
16:30 - 16:45 MAG33-09 Effects of aerosols derived from fires after the atomic bomb explosion on rainfall distribution in Hiroshima Masayuki Takigawa
Presentation No Title Presenter
Poster Presentation May 31 PM3
MAG33-P01 Analysis of Spherical Particles Extracted from Moto-Ujina Coastal Sea Sand Satoru Endo
MAG33-P02 Search for uranium-containing particles as fallout of the Hiroshima atomic bomb TAKAMIYA Koichi
MAG33-P03 Development of Isotope Ratio Analysis and Microarea Imaging Method for Radioactive Materials Masato Morita
MAG33-P04 Results of soil survey for estimation of the "Black Rain" area (Vertical profiles of radionuclides in surface soil) Satoshi FUKUTANI
MAG33-P05 Development of Numerical Model of Explosion to Reproduce the "Black Rain" Ichiro Nakamori
MAG33-P06 Study on distribution and dispersion of radionuclide fallout in Hiroshima District Yayoi Inomata
MAG33-P07 Soil Sample Archives from the Nagasaki Atomic Bombing Radioactive Fallout area Naoko FUKUDA
MAG33-P08 Vertical distribution of mercury in soils Maiko Ikegami
MAG33-P09 Characterization of new particle formation process in the Noto Peninsula based on ultrafine particle and air ion measurements Masaki Komatsu
MAG33-P10 Gold folding screen (Western gold leaf) dissolved by the "Black Rain" caused by the atomic bombing of Hiroshima Tadashi Mukai