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History of Gamma Irradiation

STERIS Isomedix has provided gamma sterilization services since 1972. However, the history of gamma irradiation dates back as far as 1895.

Gamma Irradiation: Timeline of Events

    1895 – W.C. Roentgen discovers X-rays
    1896 – A.H. Becquerel observes radiation emitted from uranium
    1897 – J. Thompson discovers the electron
    1898 – Marie & Pierre Curie discover several radioactive elements and first use the terms “radioactive” and “radio activity”
    1963 – The first gamma irradiator in the US was installed in New Jersey for the processing of medical devices

Today, gamma irradiation is used to sterilize medical devices and equipment, pharmaceuticals, and consumer products. Gamma irradiation is also used to salvage contaminated products and packaging, as well as perform materials modification in industrial applications.


What Are Gamma Rays

by Tega Jessa on September 15, 2010


Fermi mapped GeV-gamma-ray emission regions (magenta) in the W44 supernova remnant. The features clearly align with filaments detectable in other wavelengths. This composite merges X-ray data (blue) from the Germany/U.S./UK ROSAT mission, infrared (red) from NASA’s Spitzer Space Telescope, and radio (orange) from the Very Large Array near Socorro, N.M. Credit: NASA/DOE/Fermi LAT Collaboration, NASA/ROSAT, NASA/JPL-Caltech, and NRAO/AUI

In the universe there are kinds of energy and different ways it manifests itself. One common form is radiation. Radiation is the wave energy produced by electromagnetic forces. There are different kinds and their strength can be divided into three categories. There are alpha rays, beta rays, and finally gamma rays. Essentially each example is high energy particles traveling in a straight line. However, there are limits for level. Alpha rays are the weakest and can be blocked by human skin and gamma rays are the strongest and only dense elements like lead can block them.
               

So what are gamma rays? Gamma rays are the strongest from of radiation. This is what makes nuclear radiation so dangerous. This high energy form of radiation can damage human tissue and cause mutations. In circumstances where gamma radiation is plentiful most life forms would be killed within a short amount of time.

Gamma rays differ from alpha and beta waves in their composition. Alpha and beta rays are composed of discrete subatomic particles. This is part of the reason why these rays are more easily deflected by less dense matter. Gamma rays are on a whole different level. They are pure energy and radiation so only the most dense kind of matter can deflect it.

Gamma rays can be found practically anywhere in the universe. The best example is celestial bodies like the sun, pulsars, and white dwarfs. Each of these are massive sources energy burning off hydrogen in massive nuclear reactions. This produces massive amounts of radiation in the form of rays. Outside of the Earth’s protective atmosphere the radiation manifests it

Read more: http://www.universetoday.com/73704/what-are-gamma-rays,