Quasiparticle renormalization and pairing correlations in spherical superfluid nuclei
Idini, A. LU
; Barranco, F.
and Vigezzi, E.
(2012)
In Physical Review C - Nuclear Physics
85(1).
- Abstract
Within the framework of nuclear field theory (NFT), the spectrum of atomic nuclei is described in terms of collective and quasiparticle degrees of freedom, that is, of elementary modes of excitation that are directly related to experiment and of their coupling, whose strength and form factors are the basic ingredients entering in the calculations of absolute cross sections of inelastic and of one- and two-particle transfer reactions. We present a detailed discussion of the solution of the Dyson equation, also known as the Nambu-Gor'kov equations in the case of a superfluid system, which propagates medium polarization processes calculated making use of NFT to all orders of perturbation, resulting in the dressing of quasiparticles and in... (More)
Within the framework of nuclear field theory (NFT), the spectrum of atomic nuclei is described in terms of collective and quasiparticle degrees of freedom, that is, of elementary modes of excitation that are directly related to experiment and of their coupling, whose strength and form factors are the basic ingredients entering in the calculations of absolute cross sections of inelastic and of one- and two-particle transfer reactions. We present a detailed discussion of the solution of the Dyson equation, also known as the Nambu-Gor'kov equations in the case of a superfluid system, which propagates medium polarization processes calculated making use of NFT to all orders of perturbation, resulting in the dressing of quasiparticles and in the induced pairing interaction. The formalism is applied to the superfluid nucleus 120Sn. Results concerning the low-energy spectrum, that is, the quasiparticle strength distribution of the neighboring odd-A nuclei 119Sn and 121Sn, are presented and compared with the experimental findings.
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- author
- Idini, A.
LU
; Barranco, F.
and Vigezzi, E.
- publishing date
- 2012-01-31
- type
- Contribution to journal
- publication status
- published
- in
- Physical Review C - Nuclear Physics
- volume
- 85
- issue
- 1
- article number
- 014331
- publisher
- American Physical Society
- external identifiers
-
- scopus:84856630742
- ISSN
- 0556-2813
- DOI
- 10.1103/PhysRevC.85.014331
- language
- English
- LU publication?
- no
- id
- d1e36055-2125-4852-9eb6-8cab6719d12b
- date added to LUP
- 2020-07-27 09:09:44
- date last changed
- 2022-02-01 07:43:14
@article{d1e36055-2125-4852-9eb6-8cab6719d12b,
abstract = {{<p>Within the framework of nuclear field theory (NFT), the spectrum of atomic nuclei is described in terms of collective and quasiparticle degrees of freedom, that is, of elementary modes of excitation that are directly related to experiment and of their coupling, whose strength and form factors are the basic ingredients entering in the calculations of absolute cross sections of inelastic and of one- and two-particle transfer reactions. We present a detailed discussion of the solution of the Dyson equation, also known as the Nambu-Gor'kov equations in the case of a superfluid system, which propagates medium polarization processes calculated making use of NFT to all orders of perturbation, resulting in the dressing of quasiparticles and in the induced pairing interaction. The formalism is applied to the superfluid nucleus 120Sn. Results concerning the low-energy spectrum, that is, the quasiparticle strength distribution of the neighboring odd-A nuclei 119Sn and 121Sn, are presented and compared with the experimental findings.</p>}},
author = {{Idini, A. and Barranco, F. and Vigezzi, E.}},
issn = {{0556-2813}},
language = {{eng}},
month = {{01}},
number = {{1}},
publisher = {{American Physical Society}},
series = {{Physical Review C - Nuclear Physics}},
title = {{Quasiparticle renormalization and pairing correlations in spherical superfluid nuclei}},
url = {{http://dx.doi.org/10.1103/PhysRevC.85.014331}},
doi = {{10.1103/PhysRevC.85.014331}},
volume = {{85}},
year = {{2012}},
}