Pseudospin Symmetry and Spin Symmetry in Sn Isotopes from the Proton Drip Line to the Neutron Drip Line

XU Qiang; GUO Jian-You; ZHU Sheng-Jiang

Chinese Physics C> 2007, Vol. 31> Issue(2) : 168-172

Pseudospin Symmetry and Spin Symmetry in Sn Isotopes from the Proton Drip Line to the Neutron Drip Line

Department of Physics, Tsinghua University, Beijing 100084, China2 School of Physics and Material Science, Anhui University, Hefei 230039, China

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Pseudospin symmetry and spin symmetry in Sn isotopes from the proton drip line to the neutron drip line are investigated in spherical relativistic mean field theory with NLSH force parameter. We can conclude the following: (1) The pseudospin wavefunction splitting decreases from the proton drip line to the neutron drip line for all the pseudospin doublets. Only the neutron spin wavefunction splitting for the high energy level decreases monotonically with increasing the number of neutrons. (2) As for the certain isotope, when n=1, pseudospin wavefunction splitting increases monotonically with l increasing. When n=2, only the neutron spin wavefunction splitting increases monotonically with l increasing. When l=2 or 3, only the neutron spin wavefunction increases monotonically with n increasing. (3) The spin-orbital splitting for the neutron and proton is always closer to each other than their pseudospin pseudo-orbital splitting in the relativistic mean field theory.

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XU Qiang, GUO Jian-You and ZHU Sheng-Jiang. Pseudospin Symmetry and Spin Symmetry in Sn Isotopes from the Proton Drip Line to the Neutron Drip Line[J]. Chinese Physics C, 2007, 31(2): 168-172.

XU Qiang, GUO Jian-You and ZHU Sheng-Jiang. Pseudospin Symmetry and Spin Symmetry in Sn Isotopes from the Proton Drip Line to the Neutron Drip Line[J]. Chinese Physics C, 2007, 31(2): 168-172. shu

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Received: 2006-05-09
Revised: 2006-07-07

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Pseudospin Symmetry and Spin Symmetry in Sn Isotopes from the Proton Drip Line to the Neutron Drip Line

Corresponding author: ZHU Sheng-Jiang,

Department of Physics, Tsinghua University, Beijing 100084, China2 School of Physics and Material Science, Anhui University, Hefei 230039, China

Received Date: 2006-05-09

Accepted Date: 2006-07-07

Available Online: 2007-02-05

Abstract: Pseudospin symmetry and spin symmetry in Sn isotopes from the proton drip line to the neutron drip line are investigated in spherical relativistic mean field theory with NLSH force parameter. We can conclude the following: (1) The pseudospin wavefunction splitting decreases from the proton drip line to the neutron drip line for all the pseudospin doublets. Only the neutron spin wavefunction splitting for the high energy level decreases monotonically with increasing the number of neutrons. (2) As for the certain isotope, when n=1, pseudospin wavefunction splitting increases monotonically with l increasing. When n=2, only the neutron spin wavefunction splitting increases monotonically with l increasing. When l=2 or 3, only the neutron spin wavefunction increases monotonically with n increasing. (3) The spin-orbital splitting for the neutron and proton is always closer to each other than their pseudospin pseudo-orbital splitting in the relativistic mean field theory.

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Pseudospin Symmetry and Spin Symmetry in Sn Isotopes from the Proton Drip Line to the Neutron Drip Line

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