Direct Mapping of Nuclear Shell Effects in the Heaviest Elements

See allHide authors and affiliations

Science  09 Aug 2012:
DOI: 10.1126/science.1225636

You are currently viewing the abstract.

View Full Text


Quantum-mechanical shell effects are expected to strongly enhance nuclear binding on an “island of stability” of superheavy elements. The predicted center at proton number Z = 114, 120, or 126 and neutron number N = 184 has been substantiated by the recent synthesis of new elements up to Z = 118. However, the location of the center and the extension of the island of stability remain vague. High-precision mass spectrometry allows the direct measurement of nuclear binding energies and thus the determination of the strength of shell effects. Here, we present such measurements for nobelium and lawrencium isotopes, which also pin down the deformed shell gap at N = 152.

View Full Text