Complex sentence: Among other things, this data showed abundance peaks for Germanium, Xenon, and Platinum, which, according to quantum mechanics and the nuclear shell model, radioactive nuclei that decay into isotopes of these elements have closed neutron shells near the neutron drip line.
Split into simpler sentences: Among other things, this data showed abundance peaks for Germanium, Xenon, and Platinum. According to quantum mechanics and the nuclear shell model, radioactive nuclei that decay into isotopes of these elements have closed neutron shells near the neutron drip line.