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Hibakujumoku
''Hibakujumoku'' (from (日本語:被爆樹木) – "survivor tree", also known as A-bombed tree in English) is a Japanese name for a tree that survived the atomic bombing of Hiroshima in 1945. The heat emitted by the explosion in Hiroshima within the first three seconds at a distance of three kilometres from the hypocenter was about 40 times greater than that from the Sun. The initial radiation level at the hypocenter was approximately 240 Gy.〔 According to ''Hiroshima and Nagasaki: The Physical, Medical, and Social Effects of the Atomic Bombings'', plants suffered damage only in the portions exposed aboveground, while portions underground were not directly damaged. The rate of regeneration differed by species. Active regeneration was shown by broad-leaved trees.〔 Approximately 170 trees that grew in Hiroshima in 2011 had actually been there prior to the bombing.〔(【引用サイトリンク】 title =Green Legacy Hiroshima: Spreading Seeds Of Peace Across The World )〕 The oleander was designated the official flower of Hiroshima for its remarkable vitality.〔
''Hibakujumoku'' species are listed in the UNITAR database,〔(【引用サイトリンク】 title =Database of Hibaku Jumoku ? Atomic-Bombed Trees of Hiroshima )〕 shown below (combined with data from ''Hiroshima and Nagasaki: The Physical, Medical, and Social Effects of the Atomic Bombings'').
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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