Shell Evolutions and Nuclear Forces

Abstract

During the last 30 years, and more specifically during the last 10 years, many experiments have been carried out worldwide using different techniques to study the shell evolution of nuclei far from stability. What seemed not conceivable some decades ago became rather common: all known magic numbers that are present in the valley of stability disappear far from stability and are replaced by new ones at the drip line. By gathering selected experimental results, beautifully consistent pictures emerge, that very likely take root in the properties of the nuclear forces.The present manuscript describes some of these discoveries and proposes an intuitive understanding of these shell evolutions derived from observations. Extrapolations to yet unstudied regions, as where the explosive r-process nucleosynthesis occurs, are proposed. Some remaining challenges and puzzling questions are also addressed.

7 pages, 5 figures, Talk given at the 25th International Nuclear Physics Conference (INPC), Firenze, Italy, 2-7 June 2013

References in corpus (8)

• Evolution of shell structure in neutron-rich calcium isotopes
• A new effective interaction for $0\hslash \omega$ shell model calculations in the sdpf valence space
• Discovery of the shape coexisting 0+ state in 32Mg by a two neutron transfer reaction
• Unveiling the intruder deformed 0${}_2^{+}$ state in ${}^{34}$Si
• Living on the edge of stability, the limits of the nuclear landscape
• Migration of nuclear shell gaps studied in the d(24Ne,p gamma)25Ne reaction
• Shell model half-lives for r-process N=82 nuclei
• Spectroscopy of ${}^{26}$F to probe proton-neutron forces close to the drip line

Cited by in corpus (6)

• Evolution of shell structure in exotic nuclei
• Shape Coexistence in 78 Ni and the new Island of Inversion
• Shape coexistence in even-even nuclei: A theoretical overview
• Extending the Southern Shore of the Island of Inversion to ${}^{28}$F
• Anti-halo effects on reaction cross sections for ${}^{14,15,16}$C isotopes
• Spectroscopy of ${}^{28}$Na: shell evolution toward the drip line