最为有名的就是铀- 238衰变为铅- 206的半衰期为45亿年，当然放射性铷和钐也同样对测算几十亿年前的物体的年龄很有用。
Most famously, uranium-238 decays into lead-206 with a half life of 4.5 billion years, though radioactive rubidium and samarium are also useful for dating things billions of years old.
高性能的永磁体如钐钴、钕铁硼的问世使得永磁无刷直流电动机的性能大大提高了。
The availability of high performance magnets, like samarium cobalt and neodymium-boron-iron, has made it possible to improve the performance of brushless dc motors significantly.
将具有优良电磁性能的钐钴永磁用于同轴磁控管磁路系统中，可以以较小体积激励出磁感应强度高的近均匀磁场。
Sm-Co permanent magnets were used in the magnetic circuitry of a coaxial magnetron to produce a small volume, high intensity magnetic field.
产物的形成可能通过了有机钐中间体。
An organosamarium intermediate reaction mechanism has been suggested.
介绍了采用钐钴永磁铁的夹具设计方案。
The design scheme for the clamp using Sm_2 Co_17 permanent magnet is introduced.
钐，金属钐，钐金属。
使用高温固相法合成了钐锰共激活的硼硅锌玻璃。
Samarium and manganese co-doped zinc borosilicate storage glasses were prepared by high temperature solid state method.
用途：供制作金属钐、永磁材料、电子器件等用。
USES: Used for making metallic samarium, permanent magnetic materials and electronic devices, etc.
用途：供制作金属钐、永磁材料、电子器件等用。
USES: Used for making metallic samarium, permanent magnetic material and electronic devices, etc.
采用INDO方法研究了三茚基钐的电子结构和化学键。
The electronic structure and chemical bonding of Sm(Ind)3 have been studied by INDO calculation.
本文在实验的基础上论述了钐中杂质的来源，影响及控制方法。
The source, influence and control of the impurity elements in samarium are described in this paper.
本文在实验的基础上论述了钐中杂质的来源，影响及控制方法。
The source, influence and control of the impurity dements in samarium are described in this paper.
进行了镧热还原氧化钐时，烧结堆料对金属钐收率影响的研究。
Research is made on the influence of sinter pile stuff on recovery of Sm metal during La thermal reduction of Sm_(2)O_(3).
玻璃的析晶产物主要是六方（H）与三斜（T）晶型的硼酸钐晶体。
本文报道用双色三光子共振电离法测量钐原子高激发态78个新能级。
The paper reports the measurement of 78 high-lying levels in samarium atoms by two-colour three-photon resonant ionization.
本文研究了湿法制备氟化钐的两种工艺过程——传统工艺和碳酸氢铵转型新工艺。
Two technological process of samarium fluoride prepared by wet methods-one is a traditional technique and another is a new method of ammonium bicarbonate conversion.
用密度泛函B3LYP方法研究了过渡金属钐类卡宾与乙烯的环丙烷化反应的机理。
The cyclopropanation reaction of ethylene with samarium (II) carbenoid was studied by means of the B3LYP hybrid density functional method.
报道在二碘化钐作用下，硫代氨基甲酸酯发生还原反应，得到较好产率的二硫醚和酰胺化合物。
This paper reports reductive reaction of the thiocarbamic esters with samarium diiodide to give disulfidesand carboxamides in good results.
结果表明，经氯化汞活化的金属钐对酮类化合物与烯丙基或苄基卤代物的反应很有效，可高产率地生成叔醇。
Samarium metal (activated by HgCl2) is an effective reagent for allylation or benzylation of ketones. The corresponding tertiary alcs. are obtained in satisfactory yields.
考察了微波辐射时间（功率）、稀土离子和聚合物的配比以及温度等因素对配合物产率及配合物中钐离子含量的影响；
The effects of microwave radiation time (power), the composition of two reactants and the reaction temperature on the yield and Sm content in the complexes were investigated.
采用耐高温的锁定型霍尔元件和钐钴永磁转子分别构成位置与速度传感器，并设计相应的速度信号倍频电路与位置信号译码电路。
Fireresistant Hall device and SmCo rotor is used to design position and speed sensor, and the corresponding doubling circuit and decoding circuit is designed.
采用耐高温的锁定型霍尔元件和钐钴永磁转子分别构成位置与速度传感器，并设计相应的速度信号倍频电路与位置信号译码电路。
Fireresistant Hall device and SmCo rotor is used to design position and speed sensor, and the corresponding doubling circuit and decoding circuit is designed.
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