The National Institute of Standards and Technology (NIST) has developed new gamma-ray and neutron emitting sources for testing radiation detection systems. These radioactive sources were developed for testing of detection systems in maritime applications. This required special source characteristics.

Nanoplasmonics has been an attractive area of research due to its ability to localize and manipulate freely propagating radiation on the nanometer scale for strong light-matter interactions. Meanwhile, nanomechanics has set records in the sensing of mass, force, and displacement. In this work, we report efficient coupling between infrared radiation and nanomechanical resonators through nanoante...

Strategies for detecting terrorists carrying radioactive material can be evaluated in virtual environments more easily than they can be in the real world. Real scenarios expose personnel to radiation and concomitant dangers. The execution of multiple real-world scenarios – such as catching terrorists in factories, houses and open spaces – is expensive. This paper describes virtual environments ...

1 Istanbul University, Cerrahpasa Medical School Department of Radiation Oncology, Cerrahpasa, Istanbul, Turkey. 2 Department of Radiation Oncology, Tata Memorial Hospital, Parel, Mumbai, India. 3 Faculty of Medicine, Suez Canal University, Suez, Egypt. 4 Al-Soliman Radiation Oncology Unit, Port Said Early Detection and Cancer Chemotherapy Unit, Port Said General Hospital, Insurance Hospitals, ...

gamma rays pose enough energy to remove electrons from atoms of absorbing material including human body and adversely affect human health. the external exposure of human beings to natural environmental gamma radiation normally exceeds that from all man-made sources combined. therefore, we monitored gamma dose rate in indoor environments and estimated corresponding annual effective dose in selec...

The detection of hazardous radiation sources is difficult for several reasons. Sensors detect when photons, generated randomly by sources, strike crystals and so sensors don’t get continuous information streams. Radiation emanates from threats but also from walls, the ground and medical patients undergoing radiation treatment. There may be multiple, mobile, evasive sources. The number of parame...

Earth’s atmosphere is constantly being bombarded with cosmic rays. However, the origin and effect of this radiation is relatively unknown. We report on the results of a payload that was launched on the balloon sat EOSS flight 201 under the fall DemoSAT program for the COSGC. The payload was designed to measure these cosmic rays using an onboard geiger counter. These results are intended to be u...

Several years ago, it was established by the work of P. W. Kadlec of Eastern Airlines (Project TRAPCAT, Ref. 1), that clear air turbulence was frequently associated with temperature gradients or discontinuities in the atmosphere. Barnes Engineering Company had just completed the development of the Satellite Infrared Spectrometer (SIRS) for the Weather Bureau for remote atmospheric temperature p...