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Gamma Rays

Gamma Rays. By Amelia Goldstein, Mariana Gomes, and Vanessa Battista. General Information. Gamma rays have wavelengths between 10 -10 and 10 -12 meters They have frequencies 10 19 Hz and up Gamma rays are the most energetic waves and are located at the end of the spectrum.

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Gamma Rays

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  1. Gamma Rays By Amelia Goldstein, Mariana Gomes, and Vanessa Battista

  2. General Information • Gamma rays have wavelengths between 10-10 and 10-12 meters • They have frequencies 1019 Hz and up • Gamma rays are the most energetic waves and are located at the end of the spectrum

  3. Uses & Applications • Gamma Rays are used as radiotherapy for cancer treatments • They are also used for diagnostic purposes • They are used industrially to inspect castings and welds

  4. Uses & Applications The Fermi Gamma Ray Space Telescope looks at Gamma rays, and uses them to help understand pulsars, supernovae, active galaxies, dark matter, particle physics, and gamma ray sources.

  5. Can People See Them? • Gamma rays are invisible • People can only see visible rays INVISIBLE

  6. Damaging Effects Because of their high energy, Gamma rays can damage and kill living cells such as cancer cells. They break up (ionize) atoms in the materials that make up cells. If someone or something living receives radiation at high exposure levels, the body can not keep up with the repairs necessary, and the body will get radiation sickness. If the radiation is at a low enough exposure level, it can repair cells well enough to prevent this.

  7. Damaging Effects • Radiation in reproductive cells will alter genes and affect offspring. • The shorter the wavelength, the more penetrating its energy is.

  8. Discovery • Gamma Rays were discovered in 1900 by Paul Villard, a French Physicist

  9. They were later found serendipitously in the 1960s bye U.S. Military satellites

  10. Gamma Ray Bursts • Stars burst and create Gamma Ray Bursts, a.k.a. gamma ray photons, or supernovae • These are the deaths of massive stars • They are about a million billion times as bright as the sun

  11. Where They Come From • Gamma rays sometimes come from radioactive material in rocks or soil on Earth • Radioactive substances on the ground are mostly gamma radiation • Gamma rays are reaching the Earth from outer space.

  12. Other Information • Dressing a certain way can not block them • Spark chambers are appropriate to measure gamma rays with energies above 30 MeV

  13. Bibliography Information • The electromagnetic Specrum. DiCanio M. and B. Jones. "Electromagnetic Spectrum Earth and Physical Sciences Marshall Cavenish Digital 2010 Web 26 April 2010 • "Electro Magnetic spectrum" Discovery Education Classroom Resources. Web 00 May 2010 • "Gamma Radiation" The columbia Encyclopedia Sixth Edition 2008 Encyclopedia.com 6 May 2010 • Lochner, Jim and Gibb, Meredith "Imagine the Universe! Dictionary" Imagine the Universe! Homepage The Imagine Team Web. 07 May 2010 • "Gamma Rays" The World Book Student Discovery Science Encyclopedia Vol. 5 Chicago: WorldBook 2006. 19. Print • Cheng, Kwong-Sang and Gustavo E Romero. Cosmic Gamma-ray sources. Dordrecht: Kluwer Acaemic, 2004. Print. • Miln, Lorus Johnson Margery Joan Greene Milne and Bruce Hiscock. Understanding Radioactivity. New ork: Atheneum, 1989. Print.

  14. Pictures • "Teresa's Journey: Radiation Archives." Taildashf. Web. 11 May 2010. <http://www.taildashf.com/blog/radiation/>. • "Gamma-Ray Burst Physics." Astronomy and Astrophysics. Web. 11 May 2010. <http://www.astro.psu.edu/users/nnp/grbphys.html>. • "Let's CELLebrate!" The University of Vermont. Web. 11 May 2010. <http://www.uvm.edu/~inquiryb/webquest/fa06/mvogenbe/>. • "File:Fermi Gamma-ray Space Telescope.jpg." Wikimedia Commons. Web. 11 May 2010. <http://commons.wikimedia.org/wiki/File:Fermi_Gamma-ray_Space_Telescope.jpg>. • "Ebrisa Online - Paul Villard." Ebrisa Online - Página Principal. Web. 11 May 2010. http://www.ebrisa.com/portalc/ShowArticle.do%3Bjsessionid=DBF35794D8D6F88A9A00A7A1ABA78FD8?articleId=133257 • "Pirate Hollywood." Pirate News TV & Radio Show. Web. 11 May 2010. http://piratenews.org/hollywood.html • "Soil Moisture Monitoring: What Does 65% Depletion Mean?" MSU Extension Water Quality Program. Web. 12 May 2010. <http://waterquality.montana.edu/docs/irrigation/depletion.shtml>.

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