New Precision Mass Measurements of Neutron-Rich Calcium and Potassium Isotopes and Three-Nucleon Forces

被引：108

作者：

Gallant, A. T. ^{[1
,2
]}

Bale, J. C. ^{[1
,3
]}

Brunner, T. ^{[1
]}

Chowdhury, U. ^{[1
,4
]}

Ettenauer, S. ^{[1
,2
]}

Lennarz, A. ^{[1
,5
]}

Robertson, D. ^{[1
]}

Simon, V. V. ^{[1
,6
,7
]}

Chaudhuri, A. ^{[1
]}

Holt, J. D. ^{[8
,9
]}

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

Mane, E. ^{[1
]}

Menendez, J. ^{[10
,11
]}

Schultz, B. E. ^{[1
]}

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

Andreoiu, C.

Delheij, P. ^{[1
]}

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

Savajols, H. ^{[12
]}

Schwenk, A. ^{[10
,11
]}

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

机构：

[1] Univ British Columbia, TRIUMF, Vancouver, BC V6T 2A3, Canada

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

[3] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada

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

[5] Univ Munster, Inst Kernphys, D-48149 Munster, Germany

[6] Univ Munster, Fac Phys & Astron, D-69120 Heidelberg, Germany

[7] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[8] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[9] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

[10] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[11] Schwerionenforschung GmbH, ExtreMe Matter Inst EMMI, GSI Helmholtzzentrum, D-64291 Darmstadt, Germany

[12] GANIL, F-14076 Caen 05, France

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SHELL-MODEL; CA-51; TITAN; ACCURACY; SPECTROMETER; OPERATION; STABILITY; NUCLEI; IONS;

D O I：

10.1103/PhysRevLett.109.032506

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present precision Penning trap mass measurements of neutron-rich calcium and potassium isotopes in the vicinity of neutron number N = 32. Using the TITAN system, the mass of K-51 was measured for the first time, and the precision of the Ca-51,Ca-52 mass values were improved significantly. The new mass values show a dramatic increase of the binding energy compared to those reported in the atomic mass evaluation. In particular, Ca-52 is more bound by 1.74 MeV, and the behavior with neutron number deviates substantially from the tabulated values. An increased binding was predicted recently based on calculations that include three-nucleon (3N) forces. We present a comparison to improved calculations, which agree remarkably with the evolution of masses with neutron number, making neutron-rich calcium isotopes an exciting region to probe 3N forces.

引用

页数：5

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