Effect of Pairing Correlation on the Ground State and Collective Excitations of Nucleus

CAO Li-Gang; MA Zhong-Yu

Chinese Physics C> 2005, Vol. 29> Issue(4) : 354-360

Effect of Pairing Correlation on the Ground State and Collective Excitations of Nucleus

CAO Li-Gang ^, ,
MA Zhong-Yu

Institute of High Energy Physics,CAS Beijing 1000492 China Institute of Atomic Energy,Beijing 1024133 China,CAS,and Technology World Laboratory,Beijing 1000804 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 7300005 Institute of Theoretical Physics,CAS,Beijing 100080

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Abstract：
The contribution of the resonant continuum to pairing correlations is properly treated in the RMF+BCS approximation with a constant pairing strength. The results show that the contribution of the proper treatment of the resonant continuum to pairing correlations for those nuclei close to neutron drip line is important. The quasiparticle relativistic random phase approximation (QRRPA) is applied to investigate the collective excitations of open shell nucleus. The numerical calculations are performed in the case of various isoscalar giant resonances of nucleus 120Sn. The calculated results show that the QRRPA approach could satisfactorily reproduce the experimental data of the energies of low-lying states.

References

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CAO Li-Gang and MA Zhong-Yu. Effect of Pairing Correlation on the Ground State and Collective Excitations of Nucleus[J]. Chinese Physics C, 2005, 29(4): 354-360.

CAO Li-Gang and MA Zhong-Yu. Effect of Pairing Correlation on the Ground State and Collective Excitations of Nucleus[J]. Chinese Physics C, 2005, 29(4): 354-360. shu

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Received: 2004-08-16
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

Effect of Pairing Correlation on the Ground State and Collective Excitations of Nucleus

Corresponding author: CAO Li-Gang,

Institute of High Energy Physics,CAS Beijing 1000492 China Institute of Atomic Energy,Beijing 1024133 China,CAS,and Technology World Laboratory,Beijing 1000804 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 7300005 Institute of Theoretical Physics,CAS,Beijing 100080

Received Date: 2004-08-16

Accepted Date: 1900-01-01

Available Online: 2005-04-05

Abstract: The contribution of the resonant continuum to pairing correlations is properly treated in the RMF+BCS approximation with a constant pairing strength. The results show that the contribution of the proper treatment of the resonant continuum to pairing correlations for those nuclei close to neutron drip line is important. The quasiparticle relativistic random phase approximation (QRRPA) is applied to investigate the collective excitations of open shell nucleus. The numerical calculations are performed in the case of various isoscalar giant resonances of nucleus 120Sn. The calculated results show that the QRRPA approach could satisfactorily reproduce the experimental data of the energies of low-lying states.

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Effect of Pairing Correlation on the Ground State and Collective Excitations of Nucleus

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