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10–15 Jul 2016
St. Mary's University
US/Pacific timezone

Structure of 110Zr - first spectroscopy and its implications for shell evolution and the r-process

11 Jul 2016, 15:55
15m
Scotiabank Theatre (St. Mary's University)

Scotiabank Theatre

St. Mary's University

923 Robie Street Halifax Nova Scotia
Contributed Oral/Poster Shell evolution through direct reactions - Spectroscopy of nuclear levels and nuclear shapes through direct reactions

Speaker

Nancy Paul (CEA Saclay)

Description

A predicted Z=40 subshell closure in 110Zr has long been considered a potential explanation for the excess of elemental abundances before the A=130 r-process peak. We performed the first spectroscopy of this nucleus at the RIKEN-RIBF facility, populating the low-lying levels via (p,2p) knockout and measuring the energies with the MINOS tracker and DALI2 NaI array. We will present first spectroscopy results, 111Nb(p,2p)110Zr and 112Mo(p,3p)110Zr cross sections, complementary analysis of neighboring nuclei, implications for structural evolution in the 50<N<82 region, and the impact on our understanding of the formation of the A=130 r-process peak. Additionally, we report on a broader, ongoing study of (p,2p) and (p,3p) quasi-free scattering cross sections as measured during the SEASTAR (Shell Evolution And Search for Two-plus energies At RIBF) campaigns.

Primary author

Nancy Paul (CEA Saclay)

Co-author

Shell Evolution And Search for Two-plus energies At RIKEN The SEASTAR Collaboration (CEA Saclay)

Presentation materials

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