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  Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of A ≈ 100

Simon, V. V., Brunner, T., Chowdhury, U., Eberhardt, B., Ettenauer, S., Gallant, A., et al. (2012). Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of A ≈ 100. Physical Review C, 85(6): 064308, pp. 1-11. doi:10.1103/PhysRevC.85.064308.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-A329-0 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-A32A-E
Genre: Journal Article

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 Creators:
Simon, Vanessa V.1, 2, 3, Author           
Brunner, T.1, 4, Author
Chowdhury, U.1, 5, Author
Eberhardt, B.1, Author
Ettenauer, S.1, 6, Author
Gallant, A.T.1, 6, Author
Mané, E.1, Author
Simon, M.C.1, Author
Delheij, P.1, Author
Pearson, M.R.1, Author
Audi, G.7, Author
Gwinner, G.5, Author
Lunney, D.7, Author
Schatz, H.8, Author
Dilling, J.1, 6, Author
Affiliations:
1TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada, ou_persistent22              
2Department of Physics and Astronomy, University of Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany, ou_persistent22              
3Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              
4Physik Department E12, Technische Universität München, 85748 Garching, Germany, ou_persistent22              
5Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada, ou_persistent22              
6Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1, Canada, ou_persistent22              
7CSNSM-IN2P3, Université de Paris Sud, Orsay, France, ou_persistent22              
8National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA, ou_persistent22              

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 Abstract: 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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Language(s): eng - English
 Dates: 2012-06-07
 Publication Status: Issued
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevC.85.064308
 Degree: -

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Title: Physical Review C
Source Genre: Journal
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Publ. Info: New York, NY : Published for the American Physical Society by the American Institute of Physics
Pages: - Volume / Issue: 85 (6) Sequence Number: 064308 Start / End Page: 1 - 11 Identifier: ISSN: 0556-2813
CoNE: https://pure.mpg.de/cone/journals/resource/954925225009