Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

被引：11

作者：

Porter, W. S. ^{[1
,2
]}

Ashrafkhani, B. ^{[3
]}

Bergmann, J. ^{[4
]}

Brown, C. ^{[5
]}

Brunner, T. ^{[1
,6
]}

Cardona, J. D. ^{[1
,7
]}

Curien, D. ^{[8
]}

Dedes, I ^{[9
]}

Dickel, T. ^{[4
,10
]}

Dudek, J. ^{[8
,11
]}

Dunling, E. ^{[1
,12
]}

Gwinner, G. ^{[7
]}

Hockenbery, Z. ^{[1
,6
]}

Holt, J. D. ^{[1
,6
]}

Hornung, C. ^{[10
]}

Izzo, C. ^{[1
]}

Jacobs, A. ^{[1
,2
]}

Javaji, A. ^{[1
,2
]}

Kootte, B. ^{[1
,7
]}

Kripko-Koncz, G. ^{[4
]}

Lykiardopoulou, E. M. ^{[1
,2
]}

Miyagi, T. ^{[1
]}

Mukul, I ^{[1
]}

Murboeck, T. ^{[1
]}

Plass, W. R. ^{[4
,10
]}

Reiter, M. P. ^{[1
,4
,5
]}

Ringuette, J. ^{[1
,13
]}

Scheidenberger, C. ^{[4
,10
,14
]}

Silwal, R. ^{[1
,17
]}

Walls, C. ^{[1
,7
]}

Wang, H. L. ^{[15
]}

Wang, Y. ^{[1
,2
]}

Yang, J. ^{[11
,15
]}

Dilling, J. ^{[1
,2
]}

Kwiatkowski, A. A. ^{[1
,16
]}

机构：

[1] TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada

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

[3] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada

[4] Justus Liebig Univ, Phys Inst 2, D-35392 Giessen, Germany

[5] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3FD, Midlothian, Scotland

[6] McGill Univ, Dept Phys, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada

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

[8] Univ Strasbourg, CNRS, IPHC, UMR 7178, F-67037 Strasbourg, France

[9] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland

[10] GSI Helmholtzzentrum Schwerionenforsch GmbH, Planckstr 1, D-64291 Darmstadt, Germany

[11] Marie Curie Sklodowska Univ, Inst Phys, PL-20031 Lublin, Poland

[12] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[13] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA

[14] GSI Helmholtzzentrum Schwerionenforsch, Helmholtz Forsch Akad Hessen Fair HFHF, Campus Giessen, D-35392 Giessen, Germany

[15] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 4500001, Peoples R China

[16] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada

[17] Appalachian State Univ, Dept Phys & Astron, Boone, NC 28608 USA

来源：

PHYSICAL REVIEW C | 2022年 / 105卷 / 04期

基金：

中国国家自然科学基金; 英国科学技术设施理事会; 加拿大自然科学与工程研究理事会;

关键词：

ION-SOURCE; DEFORMATION;

D O I：

10.1103/PhysRevC.105.L041301

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：

Nuclear properties across the chart of nuclides are key to improving and validating our understanding of the strong interaction in nuclear physics. We present high-precision mass measurements of neutron-rich Fe isotopes performed at the TITAN facility. The multiple-reflection time-of-flight mass spectrometer (MR-ToFMS), achieving a resolving power greater than 600 000 for the first time, enabled the measurement of Fe63-70, including first-time high-precision direct measurements (delta m/m approximate to 10(-7)) of Fe68-70, as well as the discovery of a long-lived isomeric state in Fe-69. These measurements are accompanied by both mean-field and ab initio calculations using the most recent realizations which enable theoretical assignment of the spin-parities of the Fe-69 ground and isomeric states. Together with mean-field calculations of quadrupole deformation parameters for the Fe isotope chain, these results benchmark a maximum of deformation in the N = 40 island of inversion in Fe and shed light on trends in level densities indicated in the newly refined mass surface.

引用

页数：8

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