Quasiparticle time blocking approximation in coordinate space as a model for the damping of the giant dipole resonance

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Quasiparticle time blocking approximation in coordinate space as a model for the damping of the giant dipole resonance. / Litvinova, E. V.; Tselyaev, V. I.

в: Physical Review C, Том 75, № 5, 054318, 15.05.2007.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{37277d6b197340729007a81efa850dbe,

title = "Quasiparticle time blocking approximation in coordinate space as a model for the damping of the giant dipole resonance",

abstract = "The quasiparticle time blocking approximation (QTBA) is presented as a model for the description of natural-parity excitations in open-shell nuclei. Most attention is paid to the question of the damping of the giant dipole resonance. Within the model pairing correlations, two-quasiparticle (2q), and 2q-phonon configurations are included. Thus the QTBA is an extension of the quasiparticle random phase approximation to include quasiparticle-phonon coupling. Calculational formulas are presented for the case of neutral natural-parity excitations in spherical nuclei. The main equations are written in the coordinate representation that allows to take into account single-particle continuum completely. The QTBA is applied to describe E1 photoabsorption cross sections in nuclei Sn116,120,124. It has been obtained that the 2q-phonon configurations provide noticeable fragmentation of the giant dipole resonance resulting in the appearance of a significant spreading width. The results are compared with available experimental data.",

keywords = "COMPLEX CONFIGURATIONS, NUCLEI",

author = "Litvinova, {E. V.} and Tselyaev, {V. I.}",

year = "2007",

month = may,

day = "15",

doi = "10.1103/PhysRevC.75.054318",

language = "English",

volume = "75",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "5",

}

RIS

TY - JOUR

T1 - Quasiparticle time blocking approximation in coordinate space as a model for the damping of the giant dipole resonance

AU - Litvinova, E. V.

AU - Tselyaev, V. I.

PY - 2007/5/15

Y1 - 2007/5/15

N2 - The quasiparticle time blocking approximation (QTBA) is presented as a model for the description of natural-parity excitations in open-shell nuclei. Most attention is paid to the question of the damping of the giant dipole resonance. Within the model pairing correlations, two-quasiparticle (2q), and 2q-phonon configurations are included. Thus the QTBA is an extension of the quasiparticle random phase approximation to include quasiparticle-phonon coupling. Calculational formulas are presented for the case of neutral natural-parity excitations in spherical nuclei. The main equations are written in the coordinate representation that allows to take into account single-particle continuum completely. The QTBA is applied to describe E1 photoabsorption cross sections in nuclei Sn116,120,124. It has been obtained that the 2q-phonon configurations provide noticeable fragmentation of the giant dipole resonance resulting in the appearance of a significant spreading width. The results are compared with available experimental data.

AB - The quasiparticle time blocking approximation (QTBA) is presented as a model for the description of natural-parity excitations in open-shell nuclei. Most attention is paid to the question of the damping of the giant dipole resonance. Within the model pairing correlations, two-quasiparticle (2q), and 2q-phonon configurations are included. Thus the QTBA is an extension of the quasiparticle random phase approximation to include quasiparticle-phonon coupling. Calculational formulas are presented for the case of neutral natural-parity excitations in spherical nuclei. The main equations are written in the coordinate representation that allows to take into account single-particle continuum completely. The QTBA is applied to describe E1 photoabsorption cross sections in nuclei Sn116,120,124. It has been obtained that the 2q-phonon configurations provide noticeable fragmentation of the giant dipole resonance resulting in the appearance of a significant spreading width. The results are compared with available experimental data.

KW - COMPLEX CONFIGURATIONS

KW - NUCLEI

UR - http://www.scopus.com/inward/record.url?scp=34547322065&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.75.054318

DO - 10.1103/PhysRevC.75.054318

M3 - Article

VL - 75

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 5

M1 - 054318

ER -

ID: 74235046