News tagged with ionizing radiation

Related topics: radiation · radiation exposure · ct scan · radiation dose

Frequent dental X-rays linked to most common brain tumor

People who received frequent dental x-rays in the past have an increased risk of developing the most commonly diagnosed primary brain tumor in the United States. That is the finding of a study published early online in Cancer, ...

Apr 10, 2012
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New take on impacts of low dose radiation

Researchers with the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab), through a combination of time-lapse live imaging and mathematical modeling of a special line of human breast cells, ...

Dec 20, 2011
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Detecting blood clots with portable device

Blockages in lung arteries could be diagnosed safely in real-time helping as many as 20,000 respiratory patients in Australia each year with emerging technology being developed by electrical engineering researchers at the ...

Jun 10, 2015
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A new cellular response to radiation exposure

Almost the entire human genome is transcribed into RNA, but only a fraction of this is actually used to produce protein. The function of the majority of the RNA, the so-called "non-coding transcriptome" remains an enigma. ...

Apr 30, 2015
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Low-dose radiation impacts skin sensitivity

In experiments where human skin tissue samples were exposed to low doses of ionizing radiation, scientists at Pacific Northwest National Laboratory found that a skin tissue model showed perturbations that suggest its stability ...

Apr 06, 2015
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Ionizing radiation

Ionizing radiation consists of subatomic particles or electromagnetic waves that are energetic enough to detach electrons from atoms or molecules, ionizing them. The occurrence of ionization depends on the energy of the impinging individual particles or waves, and not on their number. An intense flood of particles or waves will not cause ionization if these particles or waves do not carry enough energy to be ionizing. Roughly speaking, particles or photons with energies above a few electron volts (eV) are ionizing.

Examples of ionizing particles are energetic alpha particles, beta particles, and neutrons. The ability of electromagnetic waves (photons) to ionize an atom or molecule depends on their wavelength. Radiation on the short wavelength end of the electromagnetic spectrum - ultraviolet, x-rays, and gamma rays - is ionizing.

Ionizing radiation comes from radioactive materials, x-ray tubes, particle accelerators, and is present in the environment. It is invisible and undetectable by human senses, so instruments such as geiger counters are required to detect its presence. It has many practical uses in medicine, research, construction, and other areas, but presents a health hazard if used improperly. Exposure to radiation causes microscopic damage to living tissue, resulting in skin burns, radiation sickness and death at high doses and cancer, tumors and genetic damage at low doses.

This text uses material from Wikipedia, licensed under CC BY-SA

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