Collective multipole excitations of exotic nuclei in relativistic continuum random phase approximation

YANG Ding; CAO Li-Gang; MA Zhong-Yu

doi:10.1088/1674-1137/37/12/124102

Chinese Physics C> 2013, Vol. 37> Issue(12) : 124102 DOI: 10.1088/1674-1137/37/12/124102

Collective multipole excitations of exotic nuclei in relativistic continuum random phase approximation

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Abstract：
The isoscalar and isovector collective multipole excitations in exotic nuclei are studied in the framework of a fully self-consistent relativistic continuum random phase approximation (RCRPA). In this method the contribution of the continuum spectrum to nuclear excitations is treated exactly by the single particle Green's function. Different from the cases in stable nuclei, there are strong low-energy excitations in neutron-rich nuclei and proton-rich nuclei. The neutron or proton excess pushes the centroid of the strength function to lower energies and increases the fragmentation of the strength distribution. The effect of treating the contribution of continuum exactly is also discussed.

References

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YANG Ding, CAO Li-Gang and MA Zhong-Yu. Collective multipole excitations of exotic nuclei in relativistic continuum random phase approximation[J]. Chinese Physics C, 2013, 37(12): 124102. doi: 10.1088/1674-1137/37/12/124102

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Received: 2013-01-05
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

Collective multipole excitations of exotic nuclei in relativistic continuum random phase approximation

Corresponding author: YANG Ding,

Received Date: 2013-01-05

Accepted Date: 1900-01-01

Available Online: 2013-12-05

Abstract: The isoscalar and isovector collective multipole excitations in exotic nuclei are studied in the framework of a fully self-consistent relativistic continuum random phase approximation (RCRPA). In this method the contribution of the continuum spectrum to nuclear excitations is treated exactly by the single particle Green's function. Different from the cases in stable nuclei, there are strong low-energy excitations in neutron-rich nuclei and proton-rich nuclei. The neutron or proton excess pushes the centroid of the strength function to lower energies and increases the fragmentation of the strength distribution. The effect of treating the contribution of continuum exactly is also discussed.

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Collective multipole excitations of exotic nuclei in relativistic continuum random phase approximation

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