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Alpha radiation consists of helium nuclei and is readily stopped by a sheet of paper.
Alpha particles (named after and denoted by the first letter in the Greek alphabet , α ) consist of two protons and two neutrons bound together into a particle identical to a helium nucleus , which is generally produced in the process of alpha decay , but may be produced also in other ways and given the same name.
Plutonium is a transuranic radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forming a dull coating when oxidized . The element normally exhibits six allotropes and four oxidation states .
Very high temperature reactor scheme.
Sometime between 2020 and 2040, we will invent a practically unlimited energy source that will solve the global energy crisis.
<img alt="Photo: Thomas Hannich" src="/magazine/wp-content/images/18-01/ff_new_nuke2_f.jpg" title="New Nukes" width="660" height="442" />
The thorium fuel cycle is a nuclear fuel cycle that uses the naturally abundant isotope of thorium , 232 Th , as the fertile material .
Thorium reactors would be cheap .
Credit: Justin Randall What if we could build a nuclear reactor that offered no possibility of a meltdown, generated its power inexpensively, created no weapons-grade by-products, and burnt up existing high-level waste as well as old nuclear weapon stockpiles?
(Updated August 2012)
Workers at Fukushima Daiichi nuclear power plant in the northeastern coast of Japan have been struggling to keep reactors there from overheating.
1800 GMT, 18 March 2011 Zena Iovino, reporter
Read full article Continue reading page | 1 | 2 With muddled media reports of the ongoing crisis, we spell out exactly what has happened up to 15 March, and what might happen next