Volchok H L
Science. 1967 Jun 16;156(3781):1487-9. doi: 10.1126/science.156.3781.1487.
Measurements of strontium-90 deposited in New York City over the past 12 years make for broader understanding of the fallout phenomenon. The data indicate a stratospheric half-residence time of 8 to 10 months. The seasonal oscillation of strontium-90 fallout is very symmetrical and consistent from year to year and completely independent of the timing and magnitude of nuclear tests. The predicted fallout of strontium-90 in 1970 is less than 1 percent of that during the peak year 1963.
对过去12年中沉积在纽约市的锶-90的测量有助于更广泛地了解沉降物现象。数据表明平流层的半衰期为8至10个月。锶-90沉降物的季节性振荡非常对称且年复一年保持一致，并且完全独立于核试验的时间和规模。1970年预测的锶-90沉降物不到1963年峰值年份的1%。
