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Mass measurements of neutron-rich Rb and Sr isotopes

We report on the mass measurements of several neutron-rich Rb and Sr isotopes in the A≈100 region with the TITAN Penning-trap mass spectrometer. By using highly charged ions in the charge state q=10+, the masses of 98,99Rb and 98-100Sr have been determined with a precision of 6-12 keV, making their...

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Main Authors: Klawitter, Renee (Author) , Bader, A. (Author) , Brodeur, Maxime (Author) , Chowdhury, U. (Author) , Chaudhuri, A. (Author) , Fallis, J. (Author) , Gallant, Aaron (Author) , Grossheim, A. (Author) , Kwiatkowski, A. A. (Author) , Lascar, D. (Author) , Leach, K. G. (Author) , Lennarz, A. (Author) , Macdonald, T. D. (Author) , Pearkes, J. (Author) , Seeraji, S. (Author) , Simon, Martin C. (Author) , Simon, Vanessa Véronique (Author) , Schultz, B. E. (Author) , Dilling, J. (Author)
Format: Article (Journal)
Language:English
Published: 14 April 2016
In: Physical review. C, Nuclear physics
Year: 2016, Volume: 93, Issue: 4
ISSN:2469-9985
DOI:10.1103/PhysRevC.93.045807
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevC.93.045807
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.93.045807
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Author Notes:R. Klawitter, A. Bader, M. Brodeur, U. Chowdhury, A. Chaudhuri, J. Fallis, A.T. Gallant, A. Grossheim, A.A. Kwiatkowski, D. Lascar, K.G. Leach, A. Lennarz, T.D. Macdonald, J. Pearkes, S. Seeraji, M.C. Simon, V.V. Simon, B.E. Schultz, J. Dilling
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Summary:We report on the mass measurements of several neutron-rich Rb and Sr isotopes in the A≈100 region with the TITAN Penning-trap mass spectrometer. By using highly charged ions in the charge state q=10+, the masses of 98,99Rb and 98-100Sr have been determined with a precision of 6-12 keV, making their uncertainty negligible for r-process nucleosynthesis network calculations. The mass of 101Sr has been determined directly for the first time with a precision eight times higher than the previous indirect measurement and a deviation of 3σ when compared to the Atomic Mass Evaluation. We also confirm the mass of 100Rb from a previous measurement. Furthermore, our data indicate the existence of a low-lying isomer with 80keV excitation energy in 98Rb. We show that our updated mass values lead to minor changes in the r process by calculating fractional abundances in the A≈100 region of the nuclear chart.
Item Description:Gesehen am 13.05.2020
Physical Description:Online Resource
ISSN:2469-9985
DOI:10.1103/PhysRevC.93.045807

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