Atomic clocks have been used for decades – but now, even greater precision has become possible: presenting the world's first ...

A top-down view of an experimental thorium-based nuclear reactor from the 1960s. (Photo: Oak Ridge National Laboratory, US Department of Energy) The sands of India are brimming with potential to fuel ...

The first nuclear clock based on thorium-229 shows unprecedented precision and may test if fundamental constants change.

An international team at JILA is pioneering a nuclear clock that surpasses current atomic clocks in precision, potentially ...

A recent breakthrough has paved the way for timekeeping even more precise than the measurements performed by atomic clocks.

Scientists at JILA in the US have used thorium to make a nuclear clock that is much more accurate and precise than an atomic clock.

对于许多摄影爱好者而言，可能并不清楚相机镜头的辐射问题。事实上，这个问题只有一些资深的摄影玩家才有所了解。因此，在这里，我们将对这个话题进行深入讨论。值得注意的是，主要是一些老式镜头存在辐射问题。众所周知，放射性物质对人体有害，那么为什么还要在老式镜 ...

Authorization to purchase, store, use or dispose of Uranium and Thorium compounds, such as Acetates or Nitrates must be obtained from the Radiation Safety Committee or the Radiation Safety Officer.

▲摘要：我们研究了嫦娥五号收集的月球土壤样品中的约3000个玻璃珠，并根据它们的质地、化学成分和硫同位素确定了其中3个发源于火山活动。3个火山玻璃珠的铀铅测年表明它们形成于1.2（±0.15）亿年前。这些火山玻璃珠中稀土元素和钍元素的丰度较高，表明这 ...

The low-energy excited state of thorium-229 (229Th) isotope nucleus has recently gained much attention owing to it being an ideal candidate for ultra-precise nuclear clocks. Building such ...

of radium–thorium in the centre of spheres of heavy water and beryllium respectively. These sources emit neutrons according to the well-known reactions : and . Since thorium C" emits a γ-ray of ...

The team found that the Chang'e-6 soil samples have a lower density than previous samples, indicating a more porous and loosely structured composition. The plagioclase content of the Chang'e-6 samples ...