Neutrons confirmed in Nagasaki and at the Army Pulsed Radiation Facility: implications for Hiroshima.
Neutrons confirmed in Nagasaki and at the Army Pulsed Radiation Facility: implications for Hiroshima.
复制标题
在长崎和陆军脉冲辐射设施中确认的中子：对广岛的影响。
DOI：
10.2307/3578589
复制
发表时间：
1994
影响因子：
3.4
通讯作者：
S. Egbert
中科院分区：
文献类型：
--
作者：
T. Straume;L. J. Harris;A. Marchetti;S. Egbert
最近的报告已经清楚地表明，在广岛测量的中子活化和使用当前剂量测定系统DS 86计算的活化之间存在很大的差异。这些报告证实了以前在广岛钴活化的结果，这些结果表明存在问题，这促使美国和日本联合进行了一次核试验。日本努力确定这种差异的来源。在这里，新的结果似乎消除了中子活化的测量和DS 86空气传输计算的差异在广岛的潜在来源。利用长崎的混凝土样品和放置在离裸露铀反应堆选定距离处的氯化物探测器，验证了DS 86裂变中子通过大距离空气的计算机传输。在这两种情况下，加速器质谱法被用来测量通过反应35 Cl（n，gamma）36 Cl（半衰期，301，000年）的热中子活化。在长崎和反应堆实验的中子活化测量值和DS 86计算值之间观察到良好的一致性。因此，在广岛观测到的巨大差异似乎不是由于空气传输计算或激活测量的不确定性造成的;相反，这种差异似乎是由于与广岛原子弹本身有关的不确定性造成的。
Recent reports have clearly demonstrated that large discrepancies exist between neutron activation measured in Hiroshima and activation calculated using the current dosimetry system, DS86. The reports confirmed previous results for cobalt activation in Hiroshima that suggested problems, and this has spurred a joint U.S.-Japan effort to identify the source(s) of this discrepancy. Here, new results are presented that appear to eliminate both the measurements of neutron activation and the DS86 air-transport calculations as potential sources of the discrepancy in Hiroshima. Computer transport of DS86 fission neutrons through large distances of air was validated using concrete samples from Nagasaki and chloride detectors placed at selected distances from a bare uranium reactor. In both cases, accelerator mass spectrometry was used to measure thermal neutron activation via the reaction, 35Cl(n, gamma)36Cl (half-life, 301,000 years). Good agreement was observed between measurements of neutron activation and DS86 calculations for Nagasaki, as well as for the reactor experiment. Thus the large discrepancy observed in Hiroshima appears not to be due to uncertainties in air-transport calculations or in the activation measurements; rather, the discrepancy appears to be due to uncertainties associated with the Hiroshima bomb itself.
波西宏美：健康物理学。
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--