Giant Neutron Halos in Λ-Hypernuclei ΛA a and ΛΛ ACa in the Relativistic Continuum Hartree-Bogoliubov Theory

LU Hong-Feng; MENG Jie; ZHANG Shuang-Quan

Chinese Physics C> 2003, Vol. 27> Issue(5) : 411-415

Giant Neutron Halos in Λ-Hypernuclei ΛA a and ΛΛ ACa in the Relativistic Continuum Hartree-Bogoliubov Theory

School of Physics, Peking University, Beijing 100871,China2 Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080,China3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000,China

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Abstract：
Ground state systemic properties of single-Λ and double-Λ hypernuclei for even N Ca isotopes ranging from the proton drip line to the neutron drip line are studied by using the relativistic continuum Hartree Bogoliubov theory with a density dependent δ pairing interaction. Compared with the ordinary nuclei, the predicted neutron drip line nuclei are 77Λ Ca and 78 ΛΛ Ca respectively, i.e., the last bound hypernuclei has two more neutrons than that of ordinary nuclei. Based on the analysis of two neutron separation energies, neutron single particle energy levels, the contribution of continuum and nucleon density distribution, giant halo phenomena due to pairing correlation and the contribution from the continuum are suggested to exist in Ca hypernuclei.

References

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LU Hong-Feng, MENG Jie and ZHANG Shuang-Quan. Giant Neutron Halos in Λ-Hypernuclei ΛA a and ΛΛ ACa in the Relativistic Continuum Hartree-Bogoliubov Theory[J]. Chinese Physics C, 2003, 27(5): 411-415.

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Received: 2002-06-04
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Giant Neutron Halos in Λ-Hypernuclei ΛA a and ΛΛ ACa in the Relativistic Continuum Hartree-Bogoliubov Theory

Corresponding author: MENG Jie,

School of Physics, Peking University, Beijing 100871,China2 Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080,China3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000,China

Received Date: 2002-06-04
Accepted Date: 1900-01-01
Available Online: 2003-05-05

Abstract: Ground state systemic properties of single-Λ and double-Λ hypernuclei for even N Ca isotopes ranging from the proton drip line to the neutron drip line are studied by using the relativistic continuum Hartree Bogoliubov theory with a density dependent δ pairing interaction. Compared with the ordinary nuclei, the predicted neutron drip line nuclei are 77Λ Ca and 78 ΛΛ Ca respectively, i.e., the last bound hypernuclei has two more neutrons than that of ordinary nuclei. Based on the analysis of two neutron separation energies, neutron single particle energy levels, the contribution of continuum and nucleon density distribution, giant halo phenomena due to pairing correlation and the contribution from the continuum are suggested to exist in Ca hypernuclei.