Publication Date:
2017-06-13
Description:
Author(s): R. Broda, R. V. F. Janssens, Ł. W. Iskra, J. Wrzesinski, B. Fornal, M. P. Carpenter, C. J. Chiara, N. Cieplicka-Oryńczak, C. R. Hoffman, F. G. Kondev, W. Królas, T. Lauritsen, Zs. Podolyak, D. Seweryniak, C. M. Shand, B. Szpak, W. B. Walters, S. Zhu, and B. A. Brown The nucleus 208 Pb provides an iconic test of the nuclear shell model because its 82 protons and 126 neutrons are both magic numbers. When excited levels are discovered and characterized, this nucleus provides a means to investigate the mechanisms responsible for the generation of angular momentum and, ultimately, for the development of collectivity. This experiment is a tour de force that reveals extensive new information on 208 Pb about high-angular-momentum states, isomeric states, and collective states of octupole nature; thus it serves as a showcase for shell-model descriptions. Many of the states explored show good overall agreement with theory, but others at the highest energies reveal discrepancies, pointing to the need for improved calculations. Above the highest-lying 28 − isomer γ transitions arising from yet higher spin levels could be identified in two separate experiments as displayed in the figure. [Phys. Rev. C 95, 064308] Published Mon Jun 12, 2017
Keywords:
Nuclear Structure
Print ISSN:
0556-2813
Electronic ISSN:
1089-490X
Topics:
Physics
Permalink