Relativistic quasiparticle time blocking approximation. II. Pygmy dipole resonance in neutron-rich nuclei

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Relativistic quasiparticle time blocking approximation. II. Pygmy dipole resonance in neutron-rich nuclei. / Litvinova, E.; Ring, P.; Tselyaev, V.; Langanke, K.

In: Physical Review C, Vol. 79, No. 5, 054312, 01.05.2009.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{df21db48b07f428480101b15222c12db,

title = "Relativistic quasiparticle time blocking approximation. II. Pygmy dipole resonance in neutron-rich nuclei",

abstract = "Theoretical studies of low-lying dipole strength in even-even spherical nuclei within the relativistic quasiparticle time blocking approximation (RQTBA) are presented. The RQTBA developed recently as an extension of the self-consistent relativistic quasiparticle random-phase approximation (RQRPA) enables one to investigate the effects of the coupling of two-quasiparticle excitations to collective vibrations within a fully consistent calculation scheme based on covariant energy density functional theory. Dipole spectra of even-even Sn130-Sn140 and Ni68-Ni78 isotopes calculated within both RQRPA and RQTBA show two well-separated collective structures: the higher lying giant dipole resonance and the lower lying pygmy dipole resonance, which can be identified by the different behavior of the transition densities of states in these regions.",

keywords = "STRENGTH, STATES, EXCITATION",

author = "E. Litvinova and P. Ring and V. Tselyaev and K. Langanke",

year = "2009",

month = may,

day = "1",

doi = "10.1103/PhysRevC.79.054312",

language = "English",

volume = "79",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "5",

}

RIS

TY - JOUR

T1 - Relativistic quasiparticle time blocking approximation. II. Pygmy dipole resonance in neutron-rich nuclei

AU - Litvinova, E.

AU - Ring, P.

AU - Tselyaev, V.

AU - Langanke, K.

PY - 2009/5/1

Y1 - 2009/5/1

N2 - Theoretical studies of low-lying dipole strength in even-even spherical nuclei within the relativistic quasiparticle time blocking approximation (RQTBA) are presented. The RQTBA developed recently as an extension of the self-consistent relativistic quasiparticle random-phase approximation (RQRPA) enables one to investigate the effects of the coupling of two-quasiparticle excitations to collective vibrations within a fully consistent calculation scheme based on covariant energy density functional theory. Dipole spectra of even-even Sn130-Sn140 and Ni68-Ni78 isotopes calculated within both RQRPA and RQTBA show two well-separated collective structures: the higher lying giant dipole resonance and the lower lying pygmy dipole resonance, which can be identified by the different behavior of the transition densities of states in these regions.

AB - Theoretical studies of low-lying dipole strength in even-even spherical nuclei within the relativistic quasiparticle time blocking approximation (RQTBA) are presented. The RQTBA developed recently as an extension of the self-consistent relativistic quasiparticle random-phase approximation (RQRPA) enables one to investigate the effects of the coupling of two-quasiparticle excitations to collective vibrations within a fully consistent calculation scheme based on covariant energy density functional theory. Dipole spectra of even-even Sn130-Sn140 and Ni68-Ni78 isotopes calculated within both RQRPA and RQTBA show two well-separated collective structures: the higher lying giant dipole resonance and the lower lying pygmy dipole resonance, which can be identified by the different behavior of the transition densities of states in these regions.

KW - STRENGTH

KW - STATES

KW - EXCITATION

UR - http://www.scopus.com/inward/record.url?scp=66049149884&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.79.054312

DO - 10.1103/PhysRevC.79.054312

M3 - Article

VL - 79

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 5

M1 - 054312

ER -

ID: 74234341