ARRIVAL DIRECTIONS OF COSMIC-RAY AIR SHOWERS FROM THE NORTHERN SKY
ARRIVAL DIRECTIONS OF COSMIC-RAY AIR SHOWERS FROM THE NORTHERN SKY
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DOI：
10.1103/physrev.108.450
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发表时间：
1957-10
期刊：
影响因子：
--
通讯作者：
G. Clark
中科院分区：
文献类型：
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作者：
G. Clark
已经以4度的角分辨率确定了海平面上2660个粒子数大于10⁵的空气簇射的天球到达方向。这些观测是通过快速定时方法进行的，覆盖了北纬10度到90度的赤纬带。未发现这些簇射的原初粒子在各向同性上有显著偏离。从理论上评估了阵列对不同大小和到达方向的簇射的响应，并给出了结果。计数率的天顶角依赖性表明，海平面上簇射强度随大气深度呈指数衰减，衰减长度为107±11克/平方厘米。作为该实验的一个副产品，海平面垂直方向上粒子数大于10⁵的簇射的绝对强度值为(9.6±3.0)×10⁻¹¹平方厘米⁻²秒⁻¹球面度⁻¹。（作者）
The celestial arrival directions of 2660 air showers of size greater than l0/sup 5/ particles at sea level have been determined with an angular resolution of 4 deg . The observations were made by the method of fast timing, and they cover a band of declination from l0 deg to 90 deg north. No significant deviation from isotropy of the primaries of these showers has been found. The response of the array to showers of various sizes and arrival directions has been evaluated theoretically and the results are given. The zenith angle dependence of the counting rate indicates an exponential attenuation with atmospheric depth of the intensity of showers at sea level with an attenuation length of 107 plus or minus ll g cm/sup -2/. As a by-product of the experiment a value for the absolute intensity of showers of size greater than 10/ sup 5/ particles in the vertical direction at sea level is (9.6 plus or minus 3.0) x l0/sup -11/ cm/sup -2/ sec/sup -1/ sterad/sup -1/. (auth)