Mass measurements of neutron-rich Rb and Sr isotopes

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

doi:10.1103/PhysRevC.93.045807

Mass measurements of neutron-rich Rb and Sr isotopes

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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Abstract

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 Rb98,99 and Sr98-100 have been determined with a precision of 6-12 keV, making their uncertainty negligible for r-process nucleosynthesis network calculations. The mass of Sr101 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 Rb100 from a previous measurement. Furthermore, our data indicate the existence of a low-lying isomer with 80keV excitation energy in Rb98. 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.

Original language	English
Article number	045807
Journal	Physical Review C
Volume	93
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.93.045807
State	Published - Apr 14 2016
Externally published	Yes

Funding

Funders	Funder number
National Science Foundation	1430152

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10.1103/PhysRevC.93.045807

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Klawitter, R., Bader, A., Brodeur, M., Chowdhury, U., Chaudhuri, A., Fallis, J., Gallant, A. T., Grossheim, A., Kwiatkowski, A. A., Lascar, D., Leach, K. G., Lennarz, A., Macdonald, T. D., Pearkes, J., Seeraji, S., Simon, M. C., Simon, V. V., Schultz, B. E., & Dilling, J. (2016). Mass measurements of neutron-rich Rb and Sr isotopes. Physical Review C, 93(4), Article 045807. https://doi.org/10.1103/PhysRevC.93.045807

@article{38e774f88ba74d2083bf909c2a358fe2,

title = "Mass measurements of neutron-rich Rb and Sr isotopes",

abstract = "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 Rb98,99 and Sr98-100 have been determined with a precision of 6-12 keV, making their uncertainty negligible for r-process nucleosynthesis network calculations. The mass of Sr101 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 Rb100 from a previous measurement. Furthermore, our data indicate the existence of a low-lying isomer with 80keV excitation energy in Rb98. 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.",

author = "R. Klawitter and A. Bader and M. Brodeur and U. Chowdhury and A. Chaudhuri and J. Fallis and Gallant, {A. T.} and A. Grossheim and Kwiatkowski, {A. A.} and D. Lascar and Leach, {K. G.} and A. Lennarz and Macdonald, {T. D.} and J. Pearkes and S. Seeraji and Simon, {M. C.} and Simon, {V. V.} and Schultz, {B. E.} and J. Dilling",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

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doi = "10.1103/PhysRevC.93.045807",

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Klawitter, R, Bader, A, Brodeur, M, Chowdhury, U, Chaudhuri, A, Fallis, J, Gallant, AT, Grossheim, A, Kwiatkowski, AA, Lascar, D, Leach, KG, Lennarz, A, Macdonald, TD, Pearkes, J, Seeraji, S, Simon, MC, Simon, VV, Schultz, BE & Dilling, J 2016, 'Mass measurements of neutron-rich Rb and Sr isotopes', Physical Review C, vol. 93, no. 4, 045807. https://doi.org/10.1103/PhysRevC.93.045807

TY - JOUR

T1 - Mass measurements of neutron-rich Rb and Sr isotopes

AU - Klawitter, R.

AU - Bader, A.

AU - Brodeur, M.

AU - Chowdhury, U.

AU - Chaudhuri, A.

AU - Fallis, J.

AU - Gallant, A. T.

AU - Grossheim, A.

AU - Kwiatkowski, A. A.

AU - Lascar, D.

AU - Leach, K. G.

AU - Lennarz, A.

AU - Macdonald, T. D.

AU - Pearkes, J.

AU - Seeraji, S.

AU - Simon, M. C.

AU - Simon, V. V.

AU - Schultz, B. E.

AU - Dilling, J.

PY - 2016/4/14

Y1 - 2016/4/14

N2 - 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 Rb98,99 and Sr98-100 have been determined with a precision of 6-12 keV, making their uncertainty negligible for r-process nucleosynthesis network calculations. The mass of Sr101 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 Rb100 from a previous measurement. Furthermore, our data indicate the existence of a low-lying isomer with 80keV excitation energy in Rb98. 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.

AB - 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 Rb98,99 and Sr98-100 have been determined with a precision of 6-12 keV, making their uncertainty negligible for r-process nucleosynthesis network calculations. The mass of Sr101 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 Rb100 from a previous measurement. Furthermore, our data indicate the existence of a low-lying isomer with 80keV excitation energy in Rb98. 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.

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VL - 93

JO - Physical Review C

JF - Physical Review C

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M1 - 045807

ER -

Mass measurements of neutron-rich Rb and Sr isotopes

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