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

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; J. Dilling

doi:10.1103/PhysRevC.85.064308

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

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, J. Dilling

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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.

Original language	English
Article number	064308
Journal	Physical Review C - Nuclear Physics
Volume	85
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.85.064308
State	Published - Jun 7 2012
Externally published	Yes

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Simon, V. V., Brunner, T., Chowdhury, U., Eberhardt, B., Ettenauer, S., Gallant, A. T., Mané, E., Simon, M. C., Delheij, P., Pearson, M. R., Audi, G., Gwinner, G., Lunney, D., Schatz, H., & Dilling, J. (2012). Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of A≈100. Physical Review C - Nuclear Physics, 85(6), Article 064308. https://doi.org/10.1103/PhysRevC.85.064308

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

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.",

author = "Simon, {V. V.} and T. Brunner and U. Chowdhury and B. Eberhardt and S. Ettenauer and Gallant, {A. T.} and E. Man{\'e} and Simon, {M. C.} and P. Delheij and Pearson, {M. R.} and G. Audi and G. Gwinner and D. Lunney and H. Schatz and J. Dilling",

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Simon, VV, Brunner, T, Chowdhury, U, Eberhardt, B, Ettenauer, S, Gallant, AT, Mané, E, Simon, MC, Delheij, P, Pearson, MR, Audi, G, Gwinner, G, Lunney, D, Schatz, H & Dilling, J 2012, 'Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of A≈100', Physical Review C - Nuclear Physics, vol. 85, no. 6, 064308. https://doi.org/10.1103/PhysRevC.85.064308

TY - JOUR

T1 - Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of A≈100

AU - Simon, V. V.

AU - Brunner, T.

AU - Chowdhury, U.

AU - Eberhardt, B.

AU - Ettenauer, S.

AU - Gallant, A. T.

AU - Mané, E.

AU - Simon, M. C.

AU - Delheij, P.

AU - Pearson, M. R.

AU - Audi, G.

AU - Gwinner, G.

AU - Lunney, D.

AU - Schatz, H.

AU - Dilling, J.

PY - 2012/6/7

Y1 - 2012/6/7

N2 - 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.

AB - 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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DO - 10.1103/PhysRevC.85.064308

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

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