说明:双击或选中下面任意单词,将显示该词的音标、读音、翻译等;选中中文或多个词,将显示翻译。
您的位置:首页 -> 词典 -> 钍同位素
1)  thorium isotope
钍同位素
2)  Uranium-thorium isotope
铀钍同位素
3)  thorium isotopic α source
钍同位素α源
1.
The problems in the determination of 215 Po in electrodeposited thorium isotopic α source are discussed in this paper.
讨论了电沉积钍同位素α源中215Po测量中存在的问题。
4)  isotope [英]['aɪsətəʊp]  [美]['aɪsə'top]
同位素
1.
Discussion On Geology and Isotope Characters of Jiusangou Gold Deposit in Wangqing,Jilin Province;
吉林汪清九三沟金矿床地质及同位素特征探讨
2.
Gas isotope characteristics analysis in the south of eastern sag in Liaohe Basin;
辽河盆地东部凹陷南部地区天然气的同位素特征及成因
3.
Primary discussion on isotope characteristics of coalbed gas of Qinshui basin;
沁水盆地煤层气同位素特征及成因类型初探
5)  Pb isotope
铅同位素
1.
Study on characteristics of S,Pb isotopes of the Pb-Zn deposits,Au deposits in Xicheng area and their metallogenic relationship;
西成地区铅-锌矿、金矿硫铅同位素特征及成矿关系的研究
2.
Comparative studies on Pb isotope ratios of corrosion rinds and metal cores of bronze vessels;
古代青铜器基体与其锈蚀产物铅同位素对比研究
3.
Based on a systematic lithologic and sedimentary facies analysis,this paper deals in detail with Pb isotope characteristics of dolomite and associated limestone in the Long'eni-Angdar Co ancient oil accumulation.
以系统的岩石学及沉积相分析为基础,深入探讨了隆额尼—昂达尔错古油藏白云岩及其伴生灰岩的铅同位素特征,认为该区白云岩及伴生灰岩具有统一的铅来源,铅主要来自中央隆起带变质岩、岩浆岩及再旋回沉积的三叠系地层,为地幔、造山带、地壳等多源混合的异常铅。
6)  sulfur isotope
硫同位素
1.
The lead and sulfur isotope analysis suggests that the tremendous thick and stringer ore bodies may be formed by fluid of different geologic periods.
铅和硫同位素都揭示了层状(块状)和脉状矿体可能来自不同时期的成矿流体。
2.
The new method of the thermal ionization mass spectrometry permits analysis of sulfur isotope with a precision for δ34S of 0.
环境样品的硫同位素比值能够提供硫的来源及其在环境中扩散迁移的相关信息。
3.
Acid rain has been one of the most serious environment problems in the world and the study of sulfur isotope can help us find the sulfur source,composition and have important significance for research to harness acid rain.
酸雨已经成为全球环境主要的问题之一,而硫同位素的研究对于探讨酸雨的来源、组成与酸雨的治理具有重要的意义。
补充资料:钍同位素
分子式:
CAS号:

性质:已发现质量数从212到236的25种钍同位素。天然钍几乎全由232Th组成,还含有1.35×10-8%的228Th以及小量含量不定的234Th,230Th,23lTh和229Th。天然钍中,228Th/232Th比等于其半衰期之比,228Th是232Th的衰变产物,与母体处于长期平衡中。然而,在辐照钍中228Th/232Th比可能提高,因为232U的α衰变生成附加的228Th。当钍矿中有铀存在时,天然钍就含有238U衰变链成员234Th和230Th以及235U衰变链成员231Th和227Th。232Th俘获一个中子生成233Th,后者经2次β衰变生成易裂变核素233U,故232Th是重要的次级核燃料。半衰期为7340年的229Th是233U的长寿命的子体,以很低的浓度存在于老化的辐照钍中。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条