Origin of odd-even staggering in fragment yields: Impact of nuclear pairing and 
shell structure on the particle-emission threshold energy

Mei, B.; Xu, H.S.; Tu, X.L.; Zhang, Y.H.; Litvinov, Yuri A.; Schmidt, K.-H.; Wang, M.; Sun, Z.Y.; Zhou, X.H.; Yuan, Y.J.; Ricciardi, M.V.; Kelić-Heil, A.; Reifarth, R.; Blaum, Klaus; Mao, R.S.; Hu, Z.G.; Shuai, P.; Zang, Y.D.; Ma, X.W.; Zhang, X.Y.; Xia, J.W.; Xiao, G.Q.; Guo, Z.Y.; Yang, J.C.; Zhang, X.H.; Xu, X.; Yan, X.L.; Zhang, W.; Zhan, W.L.

doi:10.1103/PhysRevC.89.054612

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Origin of odd-even staggering in fragment yields: Impact of nuclear pairing and shell structure on the particle-emission threshold energy

MPS-Authors

Tu, X.L.
Institute of Modern Physics, Chinese Academy of Sciences;
GSI Helmholtzzentrum für Schwerionenforschung GmbH;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Litvinov, Yuri A.
Institute of Modern Physics, Chinese Academy of Sciences;
GSI Helmholtzzentrum für Schwerionenforschung GmbH;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

Yan, X.L.
Institute of Modern Physics, Chinese Academy of Sciences;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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http://link.aps.org/doi/10.1103/PhysRevC.89.054612
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Citation

Mei, B., Xu, H., Tu, X., Zhang, Y., Litvinov, Y. A., Schmidt, K.-H., et al. (2014). Origin of odd-even staggering in fragment yields: Impact of nuclear pairing and shell structure on the particle-emission threshold energy. Physical Review C, 89(5): 054612. doi:10.1103/PhysRevC.89.054612.

Cite as: https://hdl.handle.net/11858/00-001M-0000-001A-16D3-1

Abstract

Strong odd-even staggering (OES) of the yields of fragments, produced by fragmenting Kr⁷⁸ projectiles, has been measured by employing the combination of an in-flight fragment separator and a storage ring. It is shown that the OES of fragment yields of T_z=−1/2 and T_z=1/2 mirror nuclei critically depends on both pairing and shell structure, especially at the closed shells Z=20 and 28. A comparison of the relative OES of yields and of particle-emission threshold energies reveals unambiguously that the origin of the OES of fragment yields is mainly determined by the OES of the particle-emission threshold energies, which contain both pairing and shell effects.