Quasiparticle time blocking approximation within the framework of generalized Green function formalism

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Quasiparticle time blocking approximation within the framework of generalized Green function formalism. / Tselyaev, V. I.

In: Physical Review C, Vol. 75, No. 2, 024306, 20.02.2007.

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

BibTeX

@article{060093246d964e699a9390a6e2a8f42f,

title = "Quasiparticle time blocking approximation within the framework of generalized Green function formalism",

abstract = "The problem of the microscopic description of excited states of the even-even open-shell atomic nuclei is considered. A model is formulated which allows one to go beyond the quasiparticle random phase approximation. The physical content of the model is determined by the quasiparticle time blocking approximation (QTBA) which enables one to include contributions of the two-quasiparticle and the two-phonon configurations, while excluding (blocking) more complicated intermediate states. In addition, the QTBA ensures consistent treatment of ground state correlations in the Fermi systems with pairing. The model is based on the generalized Green function formalism (GGFF) in which the normal and the anomalous Green functions are treated in a unified way in terms of the components of generalized Green functions in a space that is double the size of the usual single-particle space. Modification of the GGFF is considered in the case when the many-body nuclear Hamiltonian contains two-, three-, and other many-particle effective forces.",

keywords = "DYNAMIC-INTERACTION, GIANT-RESONANCES, NUCLEAR RESPONSE, MATRIX-ELEMENTS, MAGIC NUCLEI, STATES, CONFIGURATIONS, MODEL",

author = "Tselyaev, {V. I.}",

year = "2007",

month = feb,

day = "20",

doi = "10.1103/PhysRevC.75.024306",

language = "English",

volume = "75",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "2",

}

RIS

TY - JOUR

T1 - Quasiparticle time blocking approximation within the framework of generalized Green function formalism

AU - Tselyaev, V. I.

PY - 2007/2/20

Y1 - 2007/2/20

N2 - The problem of the microscopic description of excited states of the even-even open-shell atomic nuclei is considered. A model is formulated which allows one to go beyond the quasiparticle random phase approximation. The physical content of the model is determined by the quasiparticle time blocking approximation (QTBA) which enables one to include contributions of the two-quasiparticle and the two-phonon configurations, while excluding (blocking) more complicated intermediate states. In addition, the QTBA ensures consistent treatment of ground state correlations in the Fermi systems with pairing. The model is based on the generalized Green function formalism (GGFF) in which the normal and the anomalous Green functions are treated in a unified way in terms of the components of generalized Green functions in a space that is double the size of the usual single-particle space. Modification of the GGFF is considered in the case when the many-body nuclear Hamiltonian contains two-, three-, and other many-particle effective forces.

AB - The problem of the microscopic description of excited states of the even-even open-shell atomic nuclei is considered. A model is formulated which allows one to go beyond the quasiparticle random phase approximation. The physical content of the model is determined by the quasiparticle time blocking approximation (QTBA) which enables one to include contributions of the two-quasiparticle and the two-phonon configurations, while excluding (blocking) more complicated intermediate states. In addition, the QTBA ensures consistent treatment of ground state correlations in the Fermi systems with pairing. The model is based on the generalized Green function formalism (GGFF) in which the normal and the anomalous Green functions are treated in a unified way in terms of the components of generalized Green functions in a space that is double the size of the usual single-particle space. Modification of the GGFF is considered in the case when the many-body nuclear Hamiltonian contains two-, three-, and other many-particle effective forces.

KW - DYNAMIC-INTERACTION

KW - GIANT-RESONANCES

KW - NUCLEAR RESPONSE

KW - MATRIX-ELEMENTS

KW - MAGIC NUCLEI

KW - STATES

KW - CONFIGURATIONS

KW - MODEL

UR - http://www.scopus.com/inward/record.url?scp=33847198708&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.75.024306

DO - 10.1103/PhysRevC.75.024306

M3 - Article

VL - 75

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 2

M1 - 024306

ER -

ID: 74235242