cerium-140

cerium-140

[′sir·ē·əm ‚wən′fȯrd·ē]
(nuclear physics)
An isotope of cerium with atomic mass number of 140, 88.48% of the known amount of the naturally occurring element.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.