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Nuclear Materials Detector Shows Exact Location of Radiation Sources

By Guest PostNovember 3, 2010Science18 cubes, cadmium zinc telluride, conventional detectors, gamma ray detector, gamma rays, high energy photons, nuclear engineering, nuclear materials, nuclear weapons, particles of light, polaris, radiation, radiation source, semiconductor, university of michigan, zhong he

The new Polaris gamma ray detector can pinpoint the location of special nuclear materials, such as those used for dirty bombs or nuclear weapons. Image credit: Zhong He

ANN ARBOR, Mich.— A table-top gamma-ray detector created at the University of Michigan can not only identify the presence of dangerous nuclear materials, but can pinpoint and show their exact location and type, unlike conventional detectors.

“Other gamma ray detectors can tell you perhaps that nuclear materials are near a building, but with our detector, you can know the materials are in room A, or room B, for example,” said Zhong He, an associate professor in the Department of Nuclear Engineering and Radiological Sciences.

“This is the first instrument for this purpose that can give you a real-time image of the radiation source. Not only can we tell you what material is there, but we can tell you where it is, and you can find it and walk towards it.” (more…)

CU-Boulder-Led Hubble Astronomy Team Uncovers Evidence of Early Heated Universe

By Guest PostOctober 8, 2010Scienceastrophysical and planetary sciences, big bang, black hole, black holes, charles danforth, cos, cosmic origins spectrograph, dwarf galaxies, galaxies, global warming, hubble, Hubble Space Telescope, kevin france, michael shull, NASA, quasar beacon, radiation, remote universe, small galaxies, universal warming, universe, university of colorado at boulder

If you think global warming is bad, 11 billion years ago the entire universe underwent what might be called universal warming. The consequence of that early heating was that fierce blasts of radiation from voracious black holes stunted the growth of some small galaxies for a stretch of 500 million years. (more…)

Chernobyl Effects Could Last for Centuries

By PravdaSeptember 4, 2010EnvironmentChernobyl, david sumner, Greenpeace, Hiroshima, iaea, ian fairly, international atomic energy agency, mir, mutations, Nagasaki, NASA, nuclear accident, nuclear power plant, oksana kostikov, pavol stracansky, radiation, radioactive contamination, rianne teuleI, russian space station, thyroid cancer, WHO, wladimir wertelecki, world health organization

Nearly 25 years after the worst nuclear accident in history, new scientific findings suggest that the effects of the explosion at Chernobyl have been underestimated. Experts last month published a series of studies indicating that, contrary to previous findings, populations of animals decreased in the exclusion zone surrounding the site of the former nuclear power plant, and that the effects of radioactive contamination after the outbreak had been “overwhelming.”

(more…)

Global Model Confirms: Cool Roofs Can Offset Carbon Dioxide Emissions and Mitigate Global Warming

By Guest PostJuly 20, 20101 commentEnvironment, Scienceberkeley lab, carbon dioxide, carbon emissions, climate change, cool roof, cool the world, curb, doe, emissions, evaporation, goddard space flight center, hashem akbari, keith oleson, light-colored rooftops, model, NASA, ncar, radiation, steven chu, surabi menon, Technology, temperature, topography, urban heat

Can light-colored rooftops and roads really curb carbon emissions and combat global climate change?

The idea has been around for years, but now, a new study by researchers at Lawrence Berkeley National Laboratory that is the first to use a global model to study the question has found that implementing cool roofs and cool pavements in cities around the world can not only help cities stay cooler, they can also cool the world, with the potential of canceling the heating effect of up to two years of worldwide carbon dioxide emissions.

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Radiation from your cell phone

By ShamsOctober 9, 20091 commentHealth, Technologycell phone, environmental working groupm cancer, nokia 9300i, radiation, sar, smartphone, sony ericsson p910a, specific absorption rates, t-mobile mytouch 3g, text message, voice connection

Do we know how much radiation our cell phones are emitting while we are phoning or sending text messages.

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Nuclear submarine – radiation leakage

By ShamsAugust 8, 2008Environmentnuclear submarine, radiation, U.S.S Houston

U.S.S Houston, the nuclear submarine, is leaking radiation for more than 2 years. The radiation leak is too small to cause any danger (the U.S and Japanese governments say). Reuters reports and Foxnews talks.

(more…)

Tag Archives: radiation

Nuclear Materials Detector Shows Exact Location of Radiation Sources

CU-Boulder-Led Hubble Astronomy Team Uncovers Evidence of Early Heated Universe

Chernobyl Effects Could Last for Centuries

Global Model Confirms: Cool Roofs Can Offset Carbon Dioxide Emissions and Mitigate Global Warming

Radiation from your cell phone

Nuclear submarine – radiation leakage