Radioactive sources contain radioactive material of a particular radionuclide (an unstable form of an element emitting radiation), which can vary based on the application for which the source was ...

Radiation mapping has attracted widespread research attention and increased public concerns on environmental monitoring. Regarding materials and their configurations, radiation detectors have been ...

Researchers have now succeeded in producing an extremely simple and compact source of terahertz radiation: An oscillator with double resonant-tunneling diodes. Its radiation power significantly ...

Synchrotron radiation sources generate highly brilliant light pulses, ranging from infrared to hard X-rays, which can be used to gain deep insights into complex materials. Using concrete examples, ...

Radioactive sources are important in cancer treatment and gamma radiography devices in industry and keeping them safe and secure is essential — from manufacture to disposal. The IAEA’s Guidance on the ...

Thanks to the recent improvements in laser peak power, energy density, laser temporal contrast and to the large investigation of suitable target materials, in the last two decades, several groups ...

The search for and development of efficient terahertz (THz) sources is one of the major scientific goals of the 21st century. The THz region of the electromagnetic spectrum is composed of light ...

Congress asked the National Academies to review the civilian uses of radiation sources that contain radionuclides and the potential replacements for sources that pose a high risk to public health or ...

A thousand light years away, a pulsar called Vela flashes Earth with bright bursts of energy 11 times every second: radio waves, visible light, x-rays, and gamma rays. Astrophysicist Arache ...

Scientists investigating the Fukushima Daiichi nuclear power plant in Japan have found an unexpected source of radioactive material at the site. The rest of this article is behind a paywall. Please ...