![]() ![]() Gamma radiation is considered an external hazard with regards to radiation protection. Due to their high penetration power, the impact of gamma radiation can occur throughout a body, they are however less ionising than alpha particles. Gamma radiation is highly penetrating and interacts with matter through ionisation via three processes photoelectric effect, Compton scattering or pair production. What are the health effects of exposure to gamma radiation? Cosmic rays also include high-energy photons and these are also called gamma-rays whether or not they originated from nuclear decay or reaction. Gamma rays originate from the settling process of an excited nucleus of a radionuclide after it undergoes radioactive decay whereas X-rays are produced when electrons strike a target or when electrons rearrange within an atom. The key difference between gamma rays and X-rays is how they are produced. What is the difference between gamma rays and X-rays? Very dense materials, such as lead, are commonly used as shielding to slow or stop gamma rays. The high energy of gamma rays enables them to pass through many kinds of materials, including human tissue. For comparison, ultraviolet radiation has energy that falls in the range from a few electron volts to about 100 eV and does not have enough energy to be classified as ionising radiation. Gamma-ray photons generally have energies greater than 100 keV. X-ray photons have energies in the range 100 eV to 100,000 eV (or 100 keV). Scientists measure the energy of photons in electron volts (eV). Gamma-ray photons have the highest energy in the EMR spectrum and their waves have the shortest wavelength. Each photon contains a certain amount (or bundle) of energy, and all electromagnetic radiation consists of these photons. Electromagnetic radiation can be described in terms of a stream of photons, which are massless particles each travelling in a wave-like pattern and moving at the speed of light. Gamma rays are a form of electromagnetic radiation (EMR). They are the similar to X-rays, distinguished only by the fact that they are emitted from an excited nucleus. Gamma photons are the most energetic photons in the electromagnetic spectrum. What are gamma rays?Ī gamma ray ( g ) is a packet of electromagnetic energy ( photon) emitted by the nucleus of some radionuclides following radioactive decay. ![]() Precious metals (mainly gold) were the most sought-after commodities, accounting for 65% of the spending.The key difference between gamma rays and X-rays is how they are produced. In 2021, $2.1 billion was invested in mineral exploration in Canada.Domestic exports of mineral and metal products reached $103 billion in 2021, accounting for 21% of Canada’s total merchandise exports.Indigenous people accounted for 12% of the mining industry’s labour force in the 2016 census, up from 8% in 2011, which ranks mining among the leading industries for Indigenous representation.The minerals sector, which includes mining, primary processing and metal product manufacturing, directly employed 377,000 individuals in 2021.Canada is a leading global producer of many critical minerals including those used in advanced battery technologies, such as cobalt, graphite and nickel.Metals represented over two thirds of total production, and, more specifically, gold accounted for. ![]()
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