The DOI matches its Crossref record; 22 of the 22 references it cites were found in a registry or an index.
Unexpectedly large charge radii of neutron-rich calcium isotopes
Open accessAbstract
Despite being a complex many-body system, the atomic nucleus exhibits simple structures for certain ‘magic’ numbers of protons and neutrons. The calcium chain in particular is both unique and puzzling: evidence of doubly magic features are known in 40,48Ca, and recently suggested in two radioactive isotopes, 52,54Ca. Although many properties of experimentally known calcium isotopes have been successfully described by nuclear theory, it is still a challenge to predict the evolution of their charge radii. Here we present the first measurements of the charge radii of 49,51,52Ca, obtained from laser spectroscopy experiments at ISOLDE, CERN. The experimental results are complemented by state-of-the-art theoretical calculations. The large and unexpected increase of the size of the neutron-rich calcium isotopes beyond N = 28 challenges the doubly magic nature of 52Ca and opens new intriguing questions on the evolution of nuclear sizes away from stability, which are of importance for our understanding of neutron-rich atomic nuclei. Doubly magic atomic nuclei — having a magic number of both protons and neutrons — are very stable. Now, experiments revealing unexpectedly large charge radii for a series of Ca isotopes put the doubly magic nature of the 52Ca nucleus into question.
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Cites
Self-consistent mean-field models for nuclear structure
Bender, M., Heenen, P.-H., & Reinhard, P.-G. (2003) · Reviews of Modern Physics · doi:10.1103/revmodphys.75.121 · Cited by 2,501
Modern theory of nuclear forces
Epelbaum, E., Hammer, H.-W., & Meißner, U.-G. (2009) · Reviews of Modern Physics · doi:10.1103/revmodphys.81.1773 · Cited by 1,883
The Ame2012 atomic mass evaluation
Wang, M., Audi, G., Wapstra, A. H., Kondev, F. G., MacCormick, M., Xu, X., & Pfeiffer, B. (2012) · Chinese Physics C · doi:10.1088/1674-1137/36/12/003 · Cited by 1,685
Accurate charge-dependent nucleon-nucleon potential at fourth order of chiral perturbation theory
Entem, D. R., & Machleidt, R. (2003) · Physical Review C · doi:10.1103/physrevc.68.041001 · Cited by 1,574
On Closed Shells in Nuclei. II
Mayer, M. G. (1949) · Physical Review · doi:10.1103/physrev.75.1969 · Cited by 1,050
Improved nuclear matter calculations from chiral low-momentum interactions
Hebeler, K., Bogner, S. K., Furnstahl, R. J., Nogga, A., & Schwenk, A. (2011) · Physical Review C · doi:10.1103/physrevc.83.031301 · Cited by 585
Self-citationThe limits of the nuclear landscape
Erler, J., Birge, N., Kortelainen, M., Nazarewicz, W., Olsen, E., Perhac, A. M., & Stoitsov, M. (2012) · Nature · doi:10.1038/nature11188 · Cited by 566
Self-citationCoupled-cluster computations of atomic nuclei
Hagen, G., Papenbrock, T., Hjorth-Jensen, M., & Dean, D. J. (2014) · Reports on Progress in Physics · doi:10.1088/0034-4885/77/9/096302 · Cited by 531
Self-citationNuclear energy density optimization
Kortelainen, M., Lesinski, T., Moré, J., Nazarewicz, W., Sarich, J., Schunck, N., Stoitsov, M. V., & Wild, S. (2010) · Physical Review C · doi:10.1103/physrevc.82.024313 · Cited by 509
Self-citationMasses of exotic calcium isotopes pin down nuclear forces
Wienholtz, F., Beck, D., Blaum, K., Borgmann, C., Breitenfeldt, M., Cakirli, R. B., George, S., Herfurth, F., Holt, J. D., Kowalska, M., et al. (2013) · Nature · doi:10.1038/nature12226 · Cited by 488
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Cited by
Status and future of nuclear matrix elements for neutrinoless double-beta decay: a review
Engel, J., & Menéndez, J. (2017) · Reports on Progress in Physics · doi:10.1088/1361-6633/aa5bc5 · Cited by 533
A Guided Tour of ab initio Nuclear Many-Body Theory
Hergert, H. (2020) · Frontiers in Physics · doi:10.3389/fphy.2020.00379 · Cited by 269
Metadata
- Authors
- Garcia Ruiz, R. F., Bissell, M. L., Blaum, K., Ekström, A., Frömmgen, N., Hagen, G., Hammen, M., Hebeler, K., Holt, J. D., Jansen, G. R., Kowalska, M., Kreim, K., Nazarewicz, W., Neugart, R., Neyens, G., Nörtershäuser, W., Papenbrock, T., Papuga, J., Schwenk, A., Simonis, J., Wendt, K. A., & Yordanov, D. T.
- Venue
- Nature Physics
- Published
- 2016-02-08
- Volume
- 12
- Issue
- 6
- Pages
- 594-598
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- OpenAlex
- W2269746030
- Cited by
- 367
- References
- 22
- FWCI
- 19.30
- Type
- journal article
- Language
- en
- Open access
- green
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- Garcia Ruiz, R. F., Bissell, M. L., Blaum, K., Ekström, A., Frömmgen, N., Hagen, G., Hammen, M., Hebeler, K., Holt, J. D., Jansen, G. R., Kowalska, M., Kreim, K., Nazarewicz, W., Neugart, R., Neyens, G., Nörtershäuser, W., Papenbrock, T., Papuga, J., Schwenk, A., . . . Yordanov, D. T. (2016). Unexpectedly large charge radii of neutron-rich calcium isotopes. Nature Physics. https://doi.org/10.1038/nphys3645
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