Pretoria Radiocarbon Dates I
Pretoria Radiocarbon Dates I
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比勒陀利亚放射性碳日期 I
DOI：
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
Ebbie Visser
中科院分区：
文献类型：
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作者：
A. Fuls;Ebbie Visser
1969年在比勒陀利亚(25°43‘S纬度，28°21’东经；海拔1500米)中国科学院国家物理研究实验室建立了放射性碳测年设施。柜台位于一个地下房间，由精选的混凝土建造，由大约12米长的泥土覆盖。在这个房间里，宇宙辐射的核子成分实际上是不存在的，与荷兰格罗宁根的海平面相比，介子通量减少了3.5倍。一台在地表记录30 cpm的中子监测器，在地下房间里的计数约为0.1cpm。
In 1969 radiocarbon dating facilities were established at the National Physical Research Laboratory of the C.S.I.R. in Pretoria (25° 43′ S Lat, 28° 21′ E Long; alt 1500 m). The counters are situated in an underground room built of selected concrete and covered by ca. 12 m earth. In this room, the nucleonic component of cosmic radiation is practically absent and the meson flux is reduced by a factor of 3.5 as compared to the surface at sea level in Groningen, Netherlands. A neutron monitor which registers 30 cpm on the surface, counts ca. 0.1 cpm in the underground room.