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arXiv · 1504.04474

Ground-State Electromagnetic Moments of Calcium Isotopes

R. F. Garcia Ruiz·M. L. Bissell·K. Blaum·N. Frommgen·M. Hammen·J. D. Holt·M. Kowalska·K. Kreim·J. Menendez·R. Neugart·G. Neyens·W. Nortershauser·F. Nowacki·J. Papuga·A. Poves·A. Schwenk·J. Simonis·D. T. Yordanov
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Abstract

High-resolution bunched-beam collinear laser spectroscopy was used to measure the optical hyperfine spectra of the $^{43-51}$Ca isotopes. The ground state magnetic moments of $^{49,51}$Ca and quadrupole moments of $^{47,49,51}$Ca were measured for the first time, and the $^{51}$Ca ground state spin $I=3/2$ was determined in a model-independent way. Our results provide a critical test of modern nuclear theories based on shell-model calculations using phenomenological as well as microscopic interactions. The results for the neutron-rich isotopes are in excellent agreement with predictions using interactions derived from chiral effective field theory including three-nucleon forces, while lighter isotopes illustrate the presence of particle-hole excitations of the $^{40}$Ca core in their ground state.

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R. F. Garcia Ruiz, M. L. Bissell, K. Blaum, N. Frommgen, M. Hammen, J. D. Holt, M. Kowalska, K. Kreim, J. Menendez, R. Neugart, G. Neyens, W. Nortershauser, F. Nowacki, J. Papuga, A. Poves, A. Schwenk, J. Simonis, D. T. Yordanov. 2015-04-17. Ground-State Electromagnetic Moments of Calcium Isotopes. https://doi.org/10.1103/physrevc.91.041304

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