enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Radiation protection - Wikipedia

    en.wikipedia.org/wiki/Radiation_protection

    Gamma rays are better absorbed by materials with high atomic numbers and high density, although neither effect is important compared to the total mass per area in the path of the gamma ray. Ultraviolet (UV) radiation is ionizing in its shortest wavelengths but is not penetrating, so it can be shielded by thin opaque layers such as sunscreen ...

  3. Electromagnetic radiation and health - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_radiation...

    The results of the evaluation help to assess possible hazards to the safety and health of workers and to define protective measures. Since electromagnetic fields may influence passive or active implants of workers, it is essential to consider the exposure at their workplaces separately in the risk assessment .

  4. Radiation exposure - Wikipedia

    en.wikipedia.org/wiki/Radiation_exposure

    The implementation of preventive measures is essential in order to decrease the risk of exposure and to make sure healthcare workers are safe and protected. [ 12 ] One crucial measure to decrease the risk of radiation exposure in the healthcare field is having safety training for all personnel working in the different operational fields of ...

  5. Radiation damage - Wikipedia

    en.wikipedia.org/wiki/Radiation_damage

    Radiation damage is the effect of ionizing radiation on physical objects including non-living structural materials. It can be either detrimental or beneficial for materials. Radiobiology is the study of the action of ionizing radiation on living things, including the health effects of radiation in humans.

  6. Gamma ray - Wikipedia

    en.wikipedia.org/wiki/Gamma_ray

    An emitted gamma ray from any type of excited state may transfer its energy directly to any electrons, but most probably to one of the K shell electrons of the atom, causing it to be ejected from that atom, in a process generally termed the photoelectric effect (external gamma rays and ultraviolet rays may also cause this effect).

  7. Radioactive contamination - Wikipedia

    en.wikipedia.org/wiki/Radioactive_contamination

    Gamma radiation is eventually absorbed as it penetrates a dense material. Lead is good at absorbing gamma radiation, due to its density. The hazard from contamination is the emission of ionizing radiation. The principal radiations which will be encountered are alpha, beta and gamma, but these have quite different characteristics.

  8. Radiation - Wikipedia

    en.wikipedia.org/wiki/Radiation

    Gamma radiation detected in an isopropanol cloud chamber. Gamma (γ) radiation consists of photons with a wavelength less than 3 × 10 −11 m (greater than 10 19 Hz and 41.4 keV). [4] Gamma radiation emission is a nuclear process that occurs to rid an unstable nucleus of excess energy after most nuclear reactions. Both alpha and beta particles ...

  9. History of radiation protection - Wikipedia

    en.wikipedia.org/wiki/History_of_radiation...

    Unprotected experiments in the U.S. in 1896 with an early X-ray tube (Crookes tube), when the dangers of radiation were largely unknown.[1]The history of radiation protection begins at the turn of the 19th and 20th centuries with the realization that ionizing radiation from natural and artificial sources can have harmful effects on living organisms.