放射性元素

It had been used for practical ends, to identify elements and to unravel radioactive decay chains.

已将其用于实践的目的，去鉴别元素和阐明放射性衰变系。

Each element has at least one isotope with unstable nuclei that can undergo radioactive decay .

每个元素至少有一个同位素不稳定原子核可以进行放射性衰变。

Such superheavy elements are usually very radioactive and decay away almost instantly.

这种超重元素通常是具有非常强的放射性，并且几乎立即会发生衰变。

Distinguish by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions.

用放射性同位素或不寻常质量的同位素使元素或原子显示运动踪迹。

She has also determined the oxygen and other elements half-lives, published a series of about radioactive has been importantly discussing.

她还测定了氧及其他元素的半衰期，发表了一系列关于放射性的重要论著。

There was in nature another element which sent out radioactivity.

在自然界里存在着另一种具有放射性的元素。

To do this we have included 183 volcanoes with dated eruptions during the last 10,000 years, as determined by techniques such as "Radiocarbon" dating.

为了做到这一点，我们把183座在过去10000年内有爆发日期的火山包括了进去，这是用"放射性碳元素"日期测定技术来决定的。

Measurements of S, O, and radiogenic isotope ratios are all potentially powerful tracers of magma interaction with country rocks and the importance of assimilation processes in the genesis of magmatic Ni-Cu-PGE deposits.

硫、氧同位素和放射性同位素比值在示踪岩浆与围岩的反应及在岩浆镍－铜－铂族元素矿床成因中同化过程的重要性方面有很大作用。

Measurements of S, O, and radiogenic isotope ratios are all potentially powerful tracers of magma interaction with country rocks and the importance of assimilation processes in the genesis of magmatic Ni-CuPGE deposits.

硫、氧同位素和放射性同位素比值在示踪岩浆与围岩的反应及在岩浆镍-铜-铂族元素矿床成因中同化过程的重要性方面有很大作用。

Low-temperature hydrothermal processes can mask evidence of high-temperature processes in the oxygen isotope system, and in radiogenic systems such as Re/Os and Pb where involved elements may be mobile under hydrothermal conditions, or host phases may close to exchange and uptake at different temperatures.

在氧同位素体系和放射性同位素体系(如Re/Os、Pb同位素体系)中，元素在热液条件下活动性强或主相没有发生同位素交换与吸收，都会导致低温热液过程掩盖高温过程。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。