Pegg, David J. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee.
- Electron correlations
- Links to Primary Literature
- Additional Readings
An atomic or molecular system having an excess of negative charge. Negative ions, also called anions, are formed in attachment processes in which an additional electron is captured by an atom, molecule, or cluster. They can also be formed when a molecule or cluster dissociates. Doubly charged negative ions, also called dianions, have also been observed in the case of molecules and clusters. Here, two additional electrons have become attached to the neutral systems. Negative ions are destroyed in a controlled manner in detachment processes and, in the case of molecular ions or clusters, dissociation processes, when the ion interacts with photons, electrons, heavy particles, or external fields. Experimental studies of negative ions involve measurements of cross sections for detachment and dissociation. See also: Scattering experiments (atoms and molecules)
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Its dedicated editorial team is led by Sagan Award winner John Rennie. Contributors include more than 9000 highly qualified scientists and 39 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 17,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information