a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms 同义词：Am, atomic number 95,
Americium ( ) is a transuranic radioactive chemical element that has the symbol Am and atomic number 95. This transuranic element of the actinide series is located in the periodic table below the lanthanide element europium, and thus by analogy was named after another continent, America.
例句与用法
1.
Examination of radioactive materials for foods ? determination of americium - 241 食品中放射性物质检验镅- 241的测定
2.
Americium - beryllium neutron sources 镅铍中子源
3.
Americium beryllium neutron source 铍中子源
4.
Standard practice for the separation of americium from plutonium by ion exchange 用离子交换法从钚中分离镅的标准实施规程
5.
Specification of americium - 24l alpha sources for ionization smoke fire detectors 离子感烟火灾探测器用镅24l放射源的技术条件
6.
Test method for the radiochemical determination of americium - 241 in soil by alpha spectrometry 光谱法对土壤中镅- 241进行放射化学测定的试验方法
7.
Standard test method for quantitative determination of americium 241 in plutonium by gamma - ray spectrometry 用射线光谱法定量测定钚中镅241的标准试验方法
8.
It is important that study gamma - ray spectrometry of field rock and soil in the earth ' s crust . its energies range between 30kev and 3000kev , where there is much information of natural radioactive nuclides , such as uranium , thorium , potassium , and information of artificial radioactive nuclides , such as cesium , americium , cobalt , and information of the results in interaction between gamma - ray and earth ' s crust 研究表明：野外地面射线能谱测量主要研究地壳岩石土壤中产生的能量约为30kev 3000kev的射线，这里面包含着铀、钍、钾等天然放射性核素信息，核工程活动产生的大量人工放射性核素信息以及射线与地壳相互作用产生的相关信息。
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