Thursday, May 21, 2009

Angels & Demons’ antimatter theory debunked

CHICAGO: ‘Angels and Demons’, the recently released film version of the Dan Brown thriller, focuses on a plot to destroy the Vatican using a

small amount antimatter pilfered from the European particle physics laboratory CERN, the world’s largest particle accelerator.Some of the world’s top particle physicists attempted to sort through facts and fiction about antimatter on Tuesday, and comment on their real quest behind CERN — to unlock secrets about the origins of the universe. “Antimatter atoms exist, but it is very difficult to make them,” Rolf-Dieter Heuer, director-general of CERN, or the European Organization for Nuclear Research, said on Tuesday.

Antimatter particles are subatomic particles that are mirror images of matter, added Boris Kayser of the Fermi National Accelerator Laboratory in Batavia, Illinois, and chairman of the American Physical Society’s Division on Particle Physics. When the two come together, they annihilate one another, and their mass is released in the form of energy.

In Dan Brown’s book, on which the film is based, a quarter gram of antimatter was thought to be the equivalent of 5,000 tonnes of dynamite, enough to wipe out everything within a half mile or so. “That number was correct,” Kayser said. But it is not likely to be used in any bomb, they said. “It would take us billions of years to produce the amount which is used in the film,” Heuer said.

And while tempting, the notion of using antimatter as an alternative energy source is also impractical, Kayser said. It would take too much energy to make and store. Antimatter has not always been so rare. During the big bang, there were equal parts of matter and antimatter in the universe, Kayser said, and understanding what happened to antimatter is a main focus of research at Fermilab.

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