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Article: Hollow excitement energizes atomic physics. (encounter between an ion and a neutral atom produces an unusual atomic state)
- Article from:
- Science News
- Article date:
- February 16, 1991
- Author:
CopyrightCOPYRIGHT 1991 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Hollow excitement energizes atomic physics
Researchers have discovered that a close encounter between a highly charged, slowly moving ion and a metal surface often yields a neutral atom flush with excess energy -- an intriguing product they describe as a "hollow" atom. In this unusual, ephemeral atomic state, nearly every electron present occupies one of the atom's outer shells, leaving the inner shells empty.
"That's a very exotic atomic state, which no one has ever been able to study before," says Fred W. Meyer of the Oak Ridge (Tenn.) National Laboratory. "Right now, we're investigating the details of how a hollow atom is formed, how fast it's formed ...
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