Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of A ≈ 100
The neutron-rich mass region around A≈100 presents challenges for modeling the astrophysical r process because of rapid shape transitions. We report on mass measurements using the TITAN Penning trap at TRIUMF-ISAC to attain more reliable theoretical predictions of r-process nucleosynthesis paths in...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
7 June 2012
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| In: |
Physical review. C, Nuclear physics
Year: 2012, Volume: 85, Issue: 6 |
| ISSN: | 1089-490X |
| DOI: | 10.1103/PhysRevC.85.064308 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1103/PhysRevC.85.064308 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.85.064308 
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| Author Notes: | V.V. Simon, T. Brunner, U. Chowdhury, B. Eberhardt, S. Ettenauer, A.T. Gallant, E. Mané, M.C. Simon, P. Delheij, M.R. Pearson, G. Audi, G. Gwinner, D. Lunney, H. Schatz, and J. Dilling |
| Summary: | The neutron-rich mass region around A≈100 presents challenges for modeling the astrophysical r process because of rapid shape transitions. We report on mass measurements using the TITAN Penning trap at TRIUMF-ISAC to attain more reliable theoretical predictions of r-process nucleosynthesis paths in this region. A new approach using highly charged (q=15+) ions has been applied which considerably saves measurement time and preserves accuracy. New mass measurements of neutron-rich 94,97,98Rb and 94,97-99Sr have uncertainties of less than 4 keV and show deviations of up to 11σ when compared to previous measurements. An analysis using a parameterized r-process model is performed and shows that mass uncertainties for the A=90 abundance region are eliminated. |
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| Item Description: | Gesehen am 14.08.2019 Im Titel ist "beinahe gleich" als Zeichen dargestellt |
| Physical Description: | Online Resource |
| ISSN: | 1089-490X |
| DOI: | 10.1103/PhysRevC.85.064308 |