It can build up to high levels and over time can increase our risk of getting lung cancer. We are all exposed to different amounts of radon as the levels of radon vary depending on the area you live in and can vary from house to house and on the area you live in. However, you can reduce your exposure to source radon by testing your home for radon and reducing any high levels , if necessary. The amount of cosmic radiation we are exposed to depends on the altitude we live at.
The dose received varies with latitude and altitude but the variability across Ireland in extremely small. Air crew and airline passengers receive an additional dose from cosmic radiation. The dose received depends on the frequency of flights and the routes flown. Radioactive elements occur naturally in all rocks and soils and have been there since the creation of the Earth. Thoron, like radon, is a naturally occurring radioactive gas.
Unlike radon, its principal source is building materials. N atural radioactivity in soil s is transferred to crops and grazing animals and we are exposed to this radiation in our diet and drinking water. Similarly, the natural radionuclides in the sea are transferred to fish and shellfish.
The principal sources of man-made or artificial radiation that we are exposed to are :. Many procedures carried out routinely in medical diagnosis involve exposure to radiation. Some people receive no dose from medical procedures while others receive much higher doses. The human body even contains some of these naturally-occurring radioactive minerals. Cosmic radiation from space also contributes to the background radiation around us. There can be large variances in natural background radiation levels from place to place, as well as changes in the same location over time.
Some particles make it to the ground, while others interact with the atmosphere to create different types of radiation. Radiation levels increase as you get closer to the source, so the amount of cosmic radiation generally increases with elevation.
The higher the altitude, the higher the dose. That is why those living in Denver, Colorado altitude of 5, feet receive a higher annual radiation dose from cosmic radiation than someone living at sea level altitude of 0 feet. Learn more about cosmic radiation in RadTown, EPA's radiation education web area for students and teachers. Estimate your yearly dose from the most common sources of ionizing radiation with this interactive online dose calculator. Uranium and thorium naturally found in the earth are called primordial primordial Existing since the formation of the solar system, naturally occurring.
Radium, Cesium, and Strontium are examples of radionuclides. Trace amounts of uranium, thorium and their decay products can be found everywhere. Learn more about radioactive decay. Terrestrial radiation levels vary by location, but areas with higher concentrations of uranium and thorium in surface soils generally have higher dose levels. Traces of radioactive materials can be found in the body, mainly naturally occurring potassium Potassium is found in the food, soil, and water we ingest.
Skip to main content. Toggle menu Go to search page. Search Field. Radiation Exposure. Various organs respond differently to exposure to radiation, so dose is categorized to specify which part of the body received the dose: Internal vs.
External Penetrating vs. Shallow Extremity vs. Whole Body Individual organ dose e.
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