One isotope, 232 Th, is relatively stable, with a half-life of 1.405×10 10 years, considerably longer than the age of the Earth, and even slightly longer than the generally accepted age of the universe. This isotope makes up nearly all natural thorium, …

232 Th是钍元素最重要的核素，它俘获 热中子 发生（n，γ）反应的截面是7.40±0.08b，而发生 裂变 的截面仅仅是5.6×10-5 b，因此可以认为 232 Th不能被热中子所裂变。

2021年10月14日 · Thorium-231 | Th | CID 167210 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

The following table shows the atomic nuclei that are isotonic (same neutron number N = 141) and isobaric (same nucleon number A = 231) with Thorium-231. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Detailed decay information for the isotope thorium-231 including decay chains and daughter products.

トリウム(Th)は、安定同位体を持たないが、 232 Thだけはほぼ安定といえる。 地球上の同位体組成が定まっているため、 標準原子量 は定めることができる。

2014年12月18日 · Here we present new Atlantic sedimentary 231 Pa/ 230 Th data from the Holocene, the last glacial maximum and Heinrich Stadial 1, a period of abrupt cooling ca. 17,500 years ago. We combine our...

Thorium-231 ist das Radioisotop des Elements Thorium, dessen Atomkern neben den elementspezifischen 90 Protonen 141 Neutronen aufweist, woraus eine Massenzahl von 231 resultiert: 231 Th. Das Nuklid ist radioaktives, kurzlebiges Zwischenprodukt in …

钍(Th) 钍原子量232.0381，金属，是天然放射性元素。 核内质子数90，核外电子数90，核电核数90，质子质量1.5057E -25 ，质子相对质量90.63，所属周期为7，所属族数为IIIB，摩尔质量180。

Strong Gamma-rays from Decay of Th-231 (Compiled from ENSDF as of March 2011) [ Intensities before May 23th of 2013 were values when total intensity of the decay mode was 100(%) and a branching ratio of each decay mode was not multiplied.