Assertion: einsteinium's isotope | /r/HasProperty | 244 pu
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Source sentences:
text: Early analyses of debris from that explosion indicated that something unusual had occurred; the new, very neutron-rich isotope of plutonium, 244 Pu, was found during mass spectrometric analyses performed at the Argonne National Laboratory and another isotope of plutonium, 246 Pu, was detected at the Los Alamos Scientific Laboratory in the course of analyses of the Pu fractions.