| Item type |
一般雑誌記事 / Article(1) |
| 公開日 |
2023-03-15 |
| タイトル |
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タイトル |
A Crack Model of the Hiroshima Atomic Bomb: Explanation of the Contradiction of "Dosimetry System 1986" |
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言語 |
en |
| 言語 |
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言語 |
eng |
| キーワード |
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主題Scheme |
Other |
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主題 |
Crack model |
| キーワード |
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主題Scheme |
Other |
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主題 |
Hiroshima atomic bomb |
| キーワード |
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主題Scheme |
Other |
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主題 |
Neutrorl!Neutron discrepancy |
| キーワード |
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主題Scheme |
Other |
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主題 |
DS86 |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
article |
| 著者 |
Hoshi, Masaharu
Endo, Satoru
Takada, Jun
Ishikawa, Masayori
Nitta, Yumiko
Iwatani, Kazuo
oka, Takamitsu
Fujita, Shoichiro
Shizuma, Kiyoshi
Hasai, Hiromi
Hoshi, Masaharu
Endo, Satoru
Takada, Jun
Ishikawa, Masayori
Nitta, Yumiko
Iwatani, Kazuo
oka, Takamitsu
Fujita, Shoichiro
Shizuma, Kiyoshi
Hasai, Hiromi
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
There has been a large discrepancy between the Dosimetry system 1986 (DS86) 'and measured data, some of which data in Hiroshima at about 1.5 km ground distance from the hypocenter are about 10 times larger than the calculation. Therefore its causes have long been discussed , since it will change the estimated radiation risks obtained based on the Hiroshima and Nagasaki data. In this study the contradiction was explained by a bare-fission-neutron leakage model through a crack formed at the time of neutron emission. According to the present calculation, the crack has a 3 cm parallel spacing, which is symmetric with respect to the polar axis from the hypocenter to the epicenter of the atomic bomb. We made also an asymmetric opening closing 3/4 0f this symmetric geometry, because there are some data which shows asymmetry '' . In addition, the height of the neutron emission point was elevated 90 m. By using the asymmetric calculation, especially for long distant data located more than 1 km, it was verified that all of the activity data induced by thermal and fast neutrons, were simultaneously explained within the data scattering. The neutron kerma at a typical 1.5 km ground distance increases 3 and 8 times more than DS86 based on the symmetric and asymmetric model, respectively. |
| 書誌情報 |
Journal of radiation research
巻 40,
号 Suppl,
p. 145-154,
発行日 1999-12
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| 出版者 |
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出版者 |
日本放射線影響学会 |
| フォーマット |
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内容記述タイプ |
Other |
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内容記述 |
application/pdf |
oka_takamitsu_991237.pdf (700.3 kB)
