[英国《新科学家》1987年4月23日报道]切尔诺贝利放射性物质的释放,是1986年4月26日凌晨几点开始的,持续了大约10天,第一天的释放量最多。放射性释放的第二个高峰发生在第9天(5月5日)。这次事故释放的是放射性气体和颗粒的混合物。这类混合物形成了放射性物质云,它们在欧洲以及整个北半球上空扩散。最初释放的放射性物质向切尔诺贝利以北飘移,4月28日达到斯堪的纳维亚半岛,在瑞典中 [New Scientist, UK, April 23, 1987] The release of radioactive substances by Chernobyl began in the early hours of April 26, 1986, for about 10 days, with the largest amount released on the first day . The second peak of radioactive release occurs on the 9th day (May 5). The accident released a mixture of radioactive gas and particles. Such mixtures form a cloud of radioactive material that spreads over Europe and the entire northern hemisphere. The radioactive material initially released drifted north of Chernobyl and reached Scandinavia on April 28, in Sweden