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1949年9月3日,一架美军B-29远程侦察机正在东南亚1.5万米上空作例行侦察。突然,驾驶舱里的监测仪显示出发现放射性气体的异常讯号。美国空军穷追不舍,跟着带有可疑物质的云朵,从北太平洋一直飞到英伦三岛。分析结果证实,苏联在中亚的塞米巴拉金斯克进行了一次原子爆炸。俄国人如此之快便掌握了核武器技术,大大出乎美国军方的预料。美国总统杜鲁门决心以牙还牙。为使美国“免遭任何潜在敌手的攻击”,总统下令有关机构全力以赴加紧研制热核武器——氢弹。事实证明,氢弹的问世,大大提高了美苏军备竞赛的烈度。到1956年,美国在热核技术领域已遥遥领先,连当时的参议员埃斯特斯·凯福弗都相信,氢弹爆炸产生的威力足以将地轴的倾斜角改变16度。
On September 3, 1949, a U.S. B-29 long-range reconnaissance aircraft was making routine surveillance over 15,000 meters in Southeast Asia. Suddenly, the monitor in the cockpit showed an abnormal signal of radioactive gas found. The United States Air Force pursues with clouds of suspicious material, flying from the North Pacific to the British Isles. The results of the analysis confirm that the Soviet Union conducted an atomic explosion in Semipalatinsk, Central Asia. So fast that the Russians have mastered nuclear weapons technology, which is far beyond the expectations of the U.S. military. U.S. President Truman is determined to back teeth. In order for the United States to “protect itself from any potential adversary”, the president ordered the agencies concerned to go all out to step up efforts to develop a thermonuclear weapon, the hydrogen bomb. Facts have proved that the advent of hydrogen bombs has greatly enhanced the intensity of the arms race between the United States and the Soviet Union. By 1956, the United States was far ahead in the field of thermonuclear technology. Even Senator Estes Kaiofu believed then that the power of the hydrogen bomb explosion was enough to change the angle of inclination of the earth axis by 16 degrees.