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- The atmospheric helium isotope ratio: Is it changing? 大气氦同位素比率在变化吗?
- A synthetic element produced in trace quantities by helium isotope bombardment of curium. 一种合成元素,由氦同位素轰击锔可得到微量的这种元素。
- Preparation and Calibration of Reference Material for Helium Isotope 氦同位素锂辉石标准物质的研制
- According to the resul ts of carbon and helium isotopic analyses and gas component analysis,it is thoug ht that the natural gas produced in the region belongs to a typical biogenic met hane gas. 根据碳同位素与氦同位素以及气组成分析,表明该区所产天然气为典型的生物甲烷气。
- a synthetic element produced in trace quantities by helium isotope bombardment of curium 一种合成元素,由氦同位素轰击锔可得到微量的这种元素
- The mantle dynamic significance of the helium isotope component of oceanic island basalt 全球洋岛玄武岩氦同位素组成的地幔动力学意义
- 3.A synthetic element produced in trace quantities by helium isotope bombardment of curium. 锎一种合成元素,由氦同位素轰击锔可得到微量的这种元素。
- Evolution of helium isotopes in the Earth's mantle 地幔中的氦气及其释放情况
- A radioactive isotope of carbon, especially carbon 14. 放射性碳碳的一种放射性同位素,尤指碳14。
- Helium and neon are inert gases. 氦和氖为惰性气体。
- Helium isotope 氦同位素
- The antimatter equivalent of helium. 反氦与氦等价的反物质
- Helium was discovered on the sun. 氦是在太阳上发现的。
- The symbol for the isotope deuterium. 氘的化学符号同位素氘的符号
- Most big balloons are now filled with helium. 现在许多大气球中充的是氦气。
- A fountain of helium spurt out of the tube. 有一股氦的喷泉从小管中喷出。
- Helium is a gas used in balloons. 氦是一种用于气球的气体。
- Its most common form, or isotope, has 146 neutrons. 它最常见的形式或者同位素有146个中子。
- IS ~(40)Ca_(20) A STABLE ISOTOPE? ~(40)Ca_(20)是否稳定?
- Atoms of hydrogen are fused to make helium. 氢原子可熔合成氦。