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

  • 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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  • [1] Paar N, Vretenar D, Khan E, Coló G. Rep. Prog. Phys., 2007, 70: 691[2] MA Zhong-Yu, Giai N V, Wandelt A, Vretenar D, Ring P. Nucl. Phys. A, 2001, 686: 173; MA Zhong-Yu. Commun. Theo. Phys., 1999, 32: 493[3] MA Zhong-Yu, Wandelt A, Giai N V, Vretenar D, Ring P, CAO Li-Gang. Nucl. Phys. A, 2002, 703: 222[4] Ring P, MA Zhong-Yu, Giai N V, Wandelt A, Vretenar D, CAO Li-Gang. Nucl. Phys. A, 2001, 694: 249[5] Piekarewicz J. Phys. Rev. C, 2001, 64: 024307[6] CAO L G, MA Z Y. Eur. Phys. J. A, 2004, 22: 189[7] YANG Ding, CAO Li-Gang, MA Zhong-Yu. Chin. Phys. Lett., 2009, 26: 022101[8] YANG Ding, CAO Li-Gang, MA Zhong-Yu. Commun. Theor. Phys., 2010, 53: 716[9] YANG Ding, CAO Li-Gang, MA Zhong-Yu. Commun. Theor. Phys., 2010, 53: 723[10] YANG Ding, CAO Li-Gang, TIAN Yuan, MA Zhong-Yu. Phys. Rev. C, 2010, 82: 054305
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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
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 shu
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Received: 2013-01-05
Revised: 1900-01-01
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Collective multipole excitations of exotic nuclei in relativistic continuum random phase approximation

    Corresponding author: YANG Ding,

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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