Some external neutron and gamma source experiments were carried out to study the origin of the background.
还应用外置伽玛源和中子源进行了实验，以判断本底的来源。
Sealed neutron source and gamma source used in nuclear logging have strong radioactivity which is harmful to operators.
核测井使用的密封中子源和伽马源具有较强的放射性，对操作人员有一定的辐射损伤。
It would seem sensible to seek the source of these in the universe's most conspicuous energy factories: quasars and gamma-ray bursts billions of light-years away from Earth.
在宇宙中最引人注目的能量工厂——距离地球数十亿光年的类星体和伽马射线爆发——中寻找这些物质的来源似乎是明智的。
When the same source flared again after a 45 minute pause it was clear this event was not a typical gamma-ray burst.
当45分钟的停顿之后同一源头再次爆发时，很显然这一事件并非通常的伽马射线爆发。
"Pistachios are a good source of gamma-tocopherol. Eating them increases intake of gamma-tocopherol so pistachios may help to decrease lung cancer risk, " she said.
她说： “开心果是伽马生育酚的一种非常好的来源。吃开心果可以增加伽马生育酚的摄入量，因此开心果可能有助于减少患肺癌的风险。”
Methods: to localize the epileptic focus by magnetic source imaging and as a guidance for Gamma knife for treating refractory epilepsy in 8 patients.
方法：8例经磁源性影像定位癫痫灶后，指导伽玛刀放射治疗癫痫灶。
The investigators and editorialist speculate that the same is true for evening primrose oil, another source of gamma linolenic acid (GLA).
调查人员和社论作者推测迦玛亚麻油酸(GLA)的另一种来源-月见草油也有相同的情况。
A radioactive source is used to bombard the rocks surrounding the wellbore with gamma rays. By counting the backscattered gamma rays, the density of the subsurface rock can be computed.
利用放射性源的伽马射线轰击井眼周围的岩石，通过对反散射伽马射线计数，可以计算出地下岩石的密度。
A radioactive source is used to bombard the rocks surrounding the wellbore with gamma rays. By counting the backscattered gamma rays, the density of the subsurface rock can be computed.
利用放射性源的伽马射线轰击井眼周围的岩石，通过对反散射伽马射线计数，可以计算出地下岩石的密度。
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