The first of 6 linked web pages on how the inner radiation belt was discovered in 1958 by Van Allen, on the type of instrument used (Geiger counter), on the belt's explanation based on neutron albedo, on radiation belts created by nuclear bombs and on the discovery of the outer belt. This resource is nonmathematical and short; a longer exposition (with references) is also available.
<a href="http://www.compadre.org/astronomy/items/detail.cfm?ID=1554">Stern, David. Explorers 1 and 3 - The Discovery and Early History of the Earth's Radiation Belts. September 28, 2004.</a>
D. Stern, Explorers 1 and 3 - The Discovery and Early History of the Earth's Radiation Belts (2001), WWW Document, (http://www.phy6.org/Education/wexp13.html).
Stern, D. (2004, September 28). Explorers 1 and 3 - The Discovery and Early History of the Earth's Radiation Belts. Retrieved May 18, 2013, from http://www.phy6.org/Education/wexp13.html
Stern, David. Explorers 1 and 3 - The Discovery and Early History of the Earth's Radiation Belts. September 28, 2004. http://www.phy6.org/Education/wexp13.html (accessed 18 May 2013).
Stern, David. Explorers 1 and 3 - The Discovery and Early History of the Earth's Radiation Belts. 2001. 28 Sep. 2004. 18 May 2013 <http://www.phy6.org/Education/wexp13.html>.
@misc{
Author = "David Stern",
Title = {Explorers 1 and 3 - The Discovery and Early History of the Earth's Radiation Belts},
Volume = {2013},
Number = {18 May 2013},
Month = {September 28, 2004},
Year = {2001}
}
%A David Stern %T Explorers 1 and 3 - The Discovery and Early History of the Earth's Radiation Belts %D September 28, 2004 %U http://www.phy6.org/Education/wexp13.html %O text/html
%0 Electronic Source %A Stern, David %D September 28, 2004 %T Explorers 1 and 3 - The Discovery and Early History of the Earth's Radiation Belts %V 2013 %N 18 May 2013 %8 September 28, 2004 %9 text/html %U http://www.phy6.org/Education/wexp13.html
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