Examples of ionizing radiation in the following topics:
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- Up to 10 percent of invasive cancers are related to radiation exposure, including both ionizing radiation and non-ionizing radiation.
- Up to 10 percent of invasive cancers are related to radiation exposure, including both ionizing radiation and non-ionizing radiation.
- Additionally, the vast majority of non-invasive cancers are non-melanoma skin cancers caused by non-ionizing ultraviolet radiation.
- Exposure to ionizing radiation is known to increase the future incidence of cancer, particularly leukemia.
- The most widely accepted model posits that the incidence of cancer due to ionizing radiation increases linearly with effective radiation dose at a rate of 5.5 percent per sievert.
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- Ionizing radiation from fallout can cause genetic effects, birth defects, cancer, cataracts, and other organ and tissue defects.
- Intermediate stage: from 10–12 weeks; deaths in this period are from ionizing radiation in the median lethal range.
- Ionizing radiation from fallout can cause genetic effects, birth defects, cancer, cataracts, and other organ and tissue defects.
- By directly or indirectly ionizing, radiation can affect a cell's ability to conduct repair and reproduction.
- Recognize the name of the genetic defect that has been shown to be caused by acute radiation exposure during pregnancy
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- Radiation dosimetry is the measurement and calculation of the absorbed dose from exposure to indirect and direct ionizing radiation.
- Radiation dosimetry is the measurement and calculation of the absorbed dose in matter and tissue resulting from exposure to indirect and direct ionizing radiation.
- It is a scientific subspecialty in the fields of health physics and medical physics that is focused on the calculation of internal and external doses from ionizing radiation.
- Radiation dose refers to the amount of energy deposited in matter and/or biological effects of radiation.
- There are several ways of measuring doses from ionizing radiation, including personal dosimeters and ionization chambers.
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- Acute radiation syndrome or damage describes health effects present within 24 hours of exposure to high amounts of ionizing radiation.
- Acute radiation syndrome, also known as radiation poisoning, radiation sickness, or radiation toxicity, is a constellation of health effects that are present within 24 hours of exposure to high amounts of ionizing radiation, which can last for several months.
- Radiation sickness is caused by exposure to a large dose of ionizing radiation over a short period of time, typically greater than about 0.1 Gy/h.
- The onset and type of symptoms depends on the radiation exposure.
- These diseases are sometimes referred to as radiation sickness, but they are never included in the term acute radiation syndrome.
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- After this, external detectors capture and form images from the radiation that is emitted by the radiopharmaceuticals.
- This process is unlike a diagnostic X-ray, where external radiation is passed through the body to form an image.
- The radiopharmaceuticals used in nuclear medicine therapy emit ionizing radiation that travels only a short distance.
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- The rays are called nuclear radiation.
- A substance or object that emits nuclear radiation is said to be radioactive.
- In addition, radiation does not vary with temperature, pressure, or ionization state of the uranium atom.
- The Curies' radium salt glowed visibly from the radiation.
- Marie suffered from radiation-induced lesions and died of leukemia, likely caused by radiation.
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- The process of gaining or losing electrons from a neutral atom or molecule is called ionization.
- Atoms can be ionized by bombardment with radiation, but the more purely chemical process of ionization is the transfer of electrons between atoms or molecules.
- The ionization of sodium can be chemically illustrated as follows:
- Ionization is not limited to individual atoms; polyatomic ions can also be formed.
- The energy required to do so may be recorded in a successive ionization energy diagram.
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- The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.
- The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.
- Frequencies observed in astronomy range from 2.4×1023 Hz (1 GeV gamma rays) down to the local plasma frequency of the ionized interstellar medium (~1 kHz).
- Generally, electromagnetic radiation is classified by wavelength into radio wave, microwave, terahertz (or sub-millimeter) radiation, infrared, the visible region we perceive as light, ultraviolet, X-rays, and gamma rays.
- The behavior of electromagnetic radiation depends on its wavelength.
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- This property is also referred to as the ionization potentia and is measured in volts.
- Large atoms or molecules have low ionization energy, while small molecules tend to have higher ionization energies.
- The ionization energy may be an indicator of the reactivity of an element.
- Based on these two principles, the easiest element to ionize is francium and the hardest to ionize is helium.
- This video explains the periodic trends in ionization energy....periodicity.
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- The photoelectric effect is the propensity of high-energy electromagnetic radiation to eject electrons from a given material.
- In the photoelectric effect, electrons are emitted from matter (metals and non-metallic solids, liquids, or gases) as a consequence of their absorption of energy from electromagnetic radiation of high frequency (short wavelength), such as ultraviolet radiation.
- However, if the energy of the light is such that the electron is excited above energy levels associated with the atom, the electron can actually break free from the atom leading to ionization of the atom.
- For a given metal, there exists a certain minimum frequency of incident radiation below which no photoelectrons are emitted.
- However, if just the intensity of the incident radiation is increased, there is no effect on the kinetic energies of the photoelectrons.