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

被引：33

作者：

Simon, V. V. ^{[1
,2
,3
]}

Brunner, T. ^{[1
,4
]}

Chowdhury, U. ^{[1
,5
]}

Eberhardt, B. ^{[1
]}

Ettenauer, S. ^{[1
,6
]}

Gallant, A. T. ^{[1
,6
]}

Mane, E. ^{[1
]}

Simon, M. C. ^{[1
]}

Delheij, P. ^{[1
]}

Pearson, M. R. ^{[1
]}

Audi, G. ^{[7
]}

Gwinner, G. ^{[5
]}

Lunney, D. ^{[7
]}

Schatz, H. ^{[8
]}

Dilling, J. ^{[1
,6
]}

机构：

[1] TRIUMF, Vancouver, BC V6T 2A3, Canada

[2] Heidelberg Univ, Dept Phys & Astron, D-69120 Heidelberg, Germany

[3] Max Planck Inst Nucl Phys, D-69117 Heidelberg, Germany

[4] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany

[5] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada

[6] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[7] Univ Paris 11, IN2P3, CSNSM, Orsay, France

[8] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

来源：

PHYSICAL REVIEW C | 2012年 / 85卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

HIGH-PRECISION; ACCURACY; EVOLUTION; ZR; OPERATION; ENERGIES; FACILITY; RUBIDIUM; STATE; MO;

D O I：

10.1103/PhysRevC.85.064308

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The neutron-rich mass region around A approximate to 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 Rb-94,Rb-97,Rb-98 and Sr-94,Sr-97-99 have uncertainties of less than 4 keV and show deviations of up to 11 sigma 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.

引用

页数：11

共 27 条

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PHYSICAL REVIEW C, 2015, 91 (04):
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