
The SciencesNovember 1, 1972
Exotic Atoms
An electron in an atom can be briefly replaced with another particle. The resulting new atom yields information on the nature of the nucleus

Exotic Atoms
An electron in an atom can be briefly replaced with another particle. The resulting new atom yields information on the nature of the nucleus

The Antiproton
A quarter-century ago physical theory pointed to the existence of a fundamental particle of matter with the mass of the proton but the opposite charge. An account of its discovery last year