Evidence for a new nuclear ‘magic number’ from the level structure of 54Ca

@article{Steppenbeck2013EvidenceFA,
  title={Evidence for a new nuclear ‘magic number’ from the level structure of 54Ca},
  author={David Steppenbeck and Satoshi Takeuchi and Nori Aoi and Pieter Doornenbal and Michio M. Matsushita and H. W. Wang and H Baba and N. Fukuda and Shintaro Go and Michio Honma and Jinho Lee and Keishi Matsui and S. Michimasa and Tohru Motobayashi and Daiki Nishimura and Takaharu Otsuka and H. Sakurai and Yoshiaki Shiga and P.-A. S{\"o}derstr{\"o}m and T. Sumikama and H. Suzuki and R. Taniuchi and Yutaka Utsuno and J. J. Valiente-Dob{\'o}n and Ken-ichiro Yoneda},
  journal={Nature},
  year={2013},
  volume={502},
  pages={207-210}
}
Atomic nuclei are finite quantum systems composed of two distinct types of fermion—protons and neutrons. In a manner similar to that of electrons orbiting in an atom, protons and neutrons in a nucleus form shell structures. In the case of stable, naturally occurring nuclei, large energy gaps exist between shells that fill completely when the proton or neutron number is equal to 2, 8, 20, 28, 50, 82 or 126 (ref. 1). Away from stability, however, these so-called ‘magic numbers’ are known to… Expand
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References

SHOWING 1-10 OF 39 REFERENCES
Nuclear physics: Elusive magic numbers
TLDR
A new study suggests that silicon-42 is almost spherical, which is of particular interest for study of the effects of packing extra neutrons into a nucleus. Expand
Masses of exotic calcium isotopes pin down nuclear forces
TLDR
The mass determination of the exotic calcium isotopes 53Ca and 54Ca is reported, using the multi-reflection time-of-flight mass spectrometer of ISOLTRAP at CERN, to establish a prominent shell closure at neutron number N = 32, in excellent agreement with the theoretical calculations. Expand
New evidence for a subshell gap at N = 32
An 879.9(2) keVγ -ray transition has been identified following the β decay of58V and assigned as the 2 1 → 01 transition in Cr34. A peak in the energies of the first excited 2 + states for theExpand
Evolution of shell structure in neutron-rich calcium isotopes.
TLDR
Interactions from chiral effective field theory are employed and the binding energies and low-lying excitations of calcium isotopes are computed with the coupled-cluster method, finding that the positive parity states deviate strongly from the naive shell model. Expand
Three-body forces and shell structure in calcium isotopes
Understanding and predicting the formation of shell structure from nuclear forces is a central challenge for nuclear physics. While the magic numbers N = 2, 8, 20 are generally well understood, N =Expand
Three-body forces and the limit of oxygen isotopes.
TLDR
The first microscopic explanation of the oxygen anomaly based on three-nucleon forces that have been established in few-body systems is presented, which leads to repulsive contributions to the interactions among excess neutrons that change the location of the neutron drip line from (28)O to the experimentally observed (24)O. Expand
New evidence for a subshell gap at N=32
Abstract An 879.9(2) keV γ -ray transition has been identified following the β decay of 58 V and assigned as the 2 + 1 →0 + 1 transition in 58 Cr 34 . A peak in the energies of the first excited 2 +Expand
Structure of 52,54Ti and shell closures in neutron-rich nuclei above 48Ca
Abstract The level structure of 5422Ti32 has been explored for the first time by combining β-decay measurements from fragmentation products with prompt γ-ray spectroscopy following deep inelasticExpand
Magic numbers in exotic nuclei and spin-isospin properties of the NN interaction.
The magic numbers in exotic nuclei are discussed, and their novel origin is shown to be the spin-isospin dependent part of the nucleon-nucleon interaction in nuclei. The importance and robustness ofExpand
Spectroscopic study of neutron-rich calcium isotopes with a realistic shell-model interaction
We have studied neutron-rich calcium isotopes in terms of the shell model, employing a realistic effective interaction derived from the CD-Bonn nucleon-nucleon potential. The short-range repulsion ofExpand
...
1
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3
4
...