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First Exploration of Neutron Shell Structure below Lead and beyond N=126

Journal Contribution - Journal Article

The nuclei below lead but with more than 126 neutrons are crucial to an understanding of the astrophysical r process in producing nuclei heavier than A∼190. Despite their importance, the structure and properties of these nuclei remain experimentally untested as they are difficult to produce in nuclear reactions with stable beams. In a first exploration of the shell structure of this region, neutron excitations in ^{207}Hg have been probed using the neutron-adding (d,p) reaction in inverse kinematics. The radioactive beam of ^{206}Hg was delivered to the new ISOLDE Solenoidal Spectrometer at an energy above the Coulomb barrier. The spectroscopy of ^{207}Hg marks a first step in improving our understanding of the relevant structural properties of nuclei involved in a key part of the path of the r process.
Journal: Physical Review Letters
ISSN: 0031-9007
Issue: 6
Volume: 124
Publication year:2020
BOF-publication weight:6
CSS-citation score:2
Authors from:Higher Education