DISTRIBUTION OF RADIOCARBON FROM NUCLEAR TESTS
DISTRIBUTION OF RADIOCARBON FROM NUCLEAR TESTS
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DOI：
10.1038/2061029a0
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发表时间：
1965-01-01
期刊：
影响因子：
64.8
通讯作者：
LOVSETH, K
中科院分区：
文献类型：
--
作者：
NYDAL, R;LOVSETH, K
大气中的RTIFICIAL C是在空气中的氮原子与核爆炸中释放的中子之间的核反应（*”N（n，p）** C）中产生的。** C的半衰期为5，730 ± 40年”，弱β-活性的平均能量为80 keV。现代碳中由宇宙线中子引起的~* C的正常比活度范围为12-5+ 0- 2dpm（参考文献2）~ 15-3+ 0- 5dpm（参考文献3）。本文介绍我们对主要在1961年和1962年热核试验中产生的人造~* C的最新观测结果。这些测量是根据先前报告的方案进行的“，主要目的有两个：即获得关于陆地 ** C的准确数据。评估人类危害的活动，并审查大气中的迁移过程。
RTIFICIAL C in the atmosphere is produced in nucloar reactions (*" N (n, p)** C) between nitrogen atoms in the air and neutrons liberated in the nuclear explosions. The half-life of** C is 5,730+ 40 years", and the weak (3-activity has a mean energy of 80 keV. The normal specific activity of** C (induced by cosmic ray neutrons) in modern carbon is found in the range 12-5+ 0-2 dpm (ref. 2) to 15-3+ 0-5 dpm (ref. 3).The purpose of this communication is to present our latest observations of artificial** C mainly produced during the thermonuclear tests in l961 and 1962. The measure-ments are carried out according to the programme reported earlier “, with two main purposes; namely, to obtain exact data on terrestrial** C. activity for estimating the human hazard, and to examine transport processes in the atmosphere.