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	<title>地理时间 &#187; 广岛</title>
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	<description>美图看世界</description>
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		<title>大照片：广岛核爆64周年</title>
		<link>http://www.comgeo.net/archives/2049</link>
		<comments>http://www.comgeo.net/archives/2049#comments</comments>
		<pubDate>Sat, 08 Aug 2009 11:00:41 +0000</pubDate>
		<dc:creator>comgeo</dc:creator>
				<category><![CDATA[自然灾害与环境保护]]></category>
		<category><![CDATA[广岛]]></category>
		<category><![CDATA[日本]]></category>
		<category><![CDATA[纪录片]]></category>
		<category><![CDATA[视频]]></category>

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		<description><![CDATA[<p>8月6日是日本广岛遭受原子弹打击64周年。广岛之所以成为美国原子弹打击的目标，一是因当时的军事需要，二是因其地形特殊。广岛地势平缓，易于评估原子弹爆炸效果。遭受此次灾难性打击前，广岛人口约为25万。当天凌晨，美军B-29“超级空中堡垒”轰炸机“埃诺拉·盖伊”号从天宁岛起飞，携带一颗代号为“小男孩”的4000公斤重原子弹。8时15分，“小男孩”从离地面9400米的高空被投下。在57秒的下落过程中，多个复杂的引信装置一直在寻找距地面600米高的目标。被引爆以后，“小男孩”上添装的少量炸药激活了64公斤铀的超临界质量。</p><p>在这64公斤铀中，只有0.7公斤发生裂变，而其中，只有600毫克被转换为能量——爆炸产生的能量在地面形成一个巨大的火球，周围数英里陷入一片火海，巨大的冲击波将这座城市夷为平地，所有生物均遭到致命核辐射。近7万人当即丧生，到1950年，又有7万人因伤病和暴露于核辐射死亡。今天，广岛和平纪念公园矗立在地面爆炸中心附近，积极宣传世界和平，希望核武器全部销毁。（33图）</p><p>1945年9月，一名日本士兵走在原子弹轰炸后的广岛 <span class='read-more'><a href='http://www.comgeo.net/archives/2049'>浏览全文»</a></span></p><div class="clear-float"></div>
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			<content:encoded><![CDATA[<div class="ta-pageimg-left">
		<a  href="http://www.comgeo.net/archives/2049" rel="nofollow" title="大照片：广岛核爆64周年" target="_blank"><img alt="大照片：广岛核爆64周年" width="100" src="http://pic.yupoo.com/comgeo/963467e0b132/thumb.jpg" onmouseover="this.style.backgroundColor='#39b8ff'" onmouseout="this.style.backgroundColor='#FFFFFF'" /></a>
		</div><p>8月6日是日本广岛遭受原子弹打击64周年。广岛之所以成为美国原子弹打击的目标，一是因当时的军事需要，二是因其地形特殊。广岛地势平缓，易于评估原子弹爆炸效果。遭受此次灾难性打击前，广岛人口约为25万。当天凌晨，美军B-29“超级空中堡垒”轰炸机“埃诺拉·盖伊”号从天宁岛起飞，携带一颗代号为“小男孩”的4000公斤重原子弹。8时15分，“小男孩”从离地面9400米的高空被投下。在57秒的下落过程中，多个复杂的引信装置一直在寻找距地面600米高的目标。被引爆以后，“小男孩”上添装的少量炸药激活了64公斤铀的超临界质量。</p><p>在这64公斤铀中，只有0.7公斤发生裂变，而其中，只有600毫克被转换为能量——爆炸产生的能量在地面形成一个巨大的火球，周围数英里陷入一片火海，巨大的冲击波将这座城市夷为平地，所有生物均遭到致命核辐射。近7万人当即丧生，到1950年，又有7万人因伤病和暴露于核辐射死亡。今天，广岛和平纪念公园矗立在地面爆炸中心附近，积极宣传世界和平，希望核武器全部销毁。（33图）</p><p>1945年9月，一名日本士兵走在原子弹轰炸后的广岛 <span class='read-more'><a  href="http://www.comgeo.net/archives/2049">浏览全文»</a></span></p><div class="clear-float"></div>
		<hr />
<p><small>© comgeo for <a href="http://www.comgeo.net">地理时间</a>, 2009. |
<a href="http://www.comgeo.net/archives/2049">原文链接</a> |
<a href="http://www.comgeo.net/archives/2049#comments">9 comments</a> | 
<a href="http://www.weibo.com/comgeo">@地理时间</a> | 
图片托管于<a href="http://v.yupoo.com/p/comgeo/?utm_source=comgeo&utm_medium=comgeorss&utm_campaign=comgeorss" target="_blank">又拍网</a>
<br/>
Post tags: <a href="http://www.comgeo.net/archives/tag/hiroshima" rel="tag">广岛</a>, <a href="http://www.comgeo.net/archives/tag/japan" rel="tag">日本</a>, <a href="http://www.comgeo.net/archives/tag/documentary" rel="tag">纪录片</a>, <a href="http://www.comgeo.net/archives/tag/video" rel="tag">视频</a><br/>
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