Abstract
Theα decay of the new isotope180Pb was observed in40Ca bombardments of144Sm:E α = 7.23(4)MeV, and,T 1/2=(4 +4−2 )ms. With this decay energy and the known mass of176Hg, the mass excess of180Pb was calculated to be −1.98(5)MeV.
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Communicated by V. Metag
Research sponsored by the Oak Ridge National Laboratory, managed by Lockheed Martin Energy Research Corporation for the U.S. Department of Energy under contract number DEAC05-96OR22464. This work was also supported by the U.S. DOE under contract numbers DE-FG05-84ER40159 (Louisiana State University) and DE-AC03-76SF00098 (Lawrence Berkeley National Laboratory).