Rhenium187 -简介 Rhenium-187是一种放射性同位素,具有很长的半衰期。下面是有关它的性质、用途、制法和安全信息的介绍: 性质: Rhenium-187是一种银白色金属,在化学性质上类似于铬和钼。它的放射性半衰期为418亿年。 用途: Rhenium-187具有较长的半衰期和稳定性,它在地球科学领域中被广泛用于地球年代学、地质年...
20.8 atomic number 75 relative atomic mass 186.21 state at 20°c solid key isotopes 187 re electron configuration [xe]4f 14 5d 5 6s 2 what is rhenium? the two most important uses of rhenium have been in high-temperature superalloys turbine blades for aircraft engines and platinum-...
187 62.6 186.9556 5/2 3.8096 6.1682 207 22.7516 8.95×10-2 [188] 0 187.958112 上一个元素:W钨 Tungsten下一个元素:Os 锇 Osmium 您可能感兴趣的产品: 钨铼热电偶丝 关注() 铼粒 关注(1222) Rhenium(IV) Oxide 关注(1158) 甲基三氧化铼 关注(434) 七氧化二铼 关注(412) 二氧化铼 关注...
Isotopes: Rhenium has 33 isotopes whose half-lives are known, with mass numbers from 160 to 192. Naturally occurring rhenium is a mixture of two isotopes, 185Re and 187Re, with natural abundances of 37.4% and 62.6% respectively. ReferencesCarsten Reinhart, Chemical Sciences in the 20th Century...
The ratio of bound-state to continuum beta-decay of the potential cosmochronometer Re-187 using Dirac wavefunctions in a Thomas-Fermi atomic potential, including exchange corrections is calculated. A bound-state decay of not greater than about 7 percent is found for the neutral atom. This differ...
铼有29个同位素,但只有两个在自然界稳定存在,即185Re和187Re,它们的相对丰度分别为37.398±0.016,62.602±0.016。187Re经β衰变为187Os,衰变常数λ=1.666(10-11a-1,半衰期4.16×1010年。铼在纯相、总压10-4～10-6大气压下的50%凝聚温度为1818℃。
Naturally occurring rhenium is a mixture of a stable isotope, Rhenium-185 and a radioactive isotope, Rhenium-187 [2, 9]. It shows moderate reactivity with various compounds, except water. Though its usual commercial form is powder, foils, sheets, pellets, bars, and rods are also produced ...
Natural rhenium is a mixture of the stable isotope rhenium-185 (37.4 percent) and the radioactive rhenium-187 (62.6 percent, 4.1 × 1010-year half-life). Element Properties atomic number 75 atomic weight 186.2 melting point 3,180 °C (5,756 °F) boiling point 5,627 °C (10,161 °F...
(≈0.1) inultramafic rocksand high values (≈10) incontinental crust. Rhenium has two stable isotopes (185Re and187Re), one of which,187Re, decays into187Os with a half-life of 41.6Ga (λ=1.666×10−11years−1). Osmium has seven isotopes (184Os,186Os,187Os,188Os,189Os,190Os ...
Variations in the 187Os/188Os isotopic signature of mantle and mantle-derived rocks have been thought to provide a powerful chemical tracer of deep Earth structure. Many studies have inferred from such data that a long-lived, high-rhenium component exist