A case of accidental inhalation of zinc-65 and silver-110m.
A case of accidental inhalation of zinc-65 and silver-110m.
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误吸入锌65、银110m一例。
DOI：
10.2307/3572021
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发表时间：
1966
影响因子：
3.4
通讯作者：
A. Holmes
中科院分区：
文献类型：
--
作者：
D. Newton;A. Holmes
约1.5nCi的锌-65和约3 nCi的钴-60。由于这些调查结果，他在事件发生后2天被转诊进行身体放射性测量。大多数这些核素在体内的存在已经确定，虽然与最大允许值相比，每种核素的负荷都很小（2），但两种主要污染物的水平表明，有可能对它们的保留和分布进行长期研究。方法和测量受试者定期在Harwell全身γ射线光谱仪（3）中进行测量，该光谱仪采用四个4英寸× 2英寸碘化钠晶体探测器，两个位于仰卧受试者上方，两个位于仰卧受试者下方。第一次测量是在事件发生后2天进行的，随后的光谱获得间隔从最初几周的约5天增加到一年后的约2个月。通过计算机最小二乘拟合方法（4）分析光谱的组分活性。标准光谱是从已知量的每一种活性中获得的，计算机计算出每一种活性的量，当它们结合在一起时，将提供对每一种活性的最佳拟合。
about 1.5 nCi of zinc-65 and about 3 nCi of cobalt-60. As a result of these findings, he was referred for body radioactivity measurements 2 days after the incident. The presence in vivo of most of these nuclides was established, and, while the burden of each was small compared with the maximum permissible (2), the levels of the two principal contaminants suggested that a prolonged study of their retention and distribution might be possible. METHODS AND MEASUREMENTS The subject was measured periodically in the Harwell whole-body y-ray spectrometer (3) which employed four 4-inch X 2-inch sodium iodide crystal detectors situated two above and two below the supine subject. The first measurement was made 2 days after the incident, and subsequently spectra were obtained at intervals increasing from about 5 days during the first few weeks to about 2 months after a year had elapsed. The spectra were analyzed for their constituent activities by a computer method of least-squares fitting (4). Standard spectra were obtained from known amounts of each activity in phantoms, and the computer calculated the amounts of each which, when combined, would provide the best fit to each of the in