Nguyen Van Giai

Institut de Physique

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V. V. Voronov

Joint Institute for Nuclear Research

A. P. Severyukhin

Joint Institute for Nuclear Research

J. Meng

Peking University

G. Colò

Istituto Nazionale di Fisica Nucleare, Sezione di Milano

M. Grasso

Centre National de la Recherche Scientifique

E. Khan

Laboratoire de Physique des 2 Infinis Irène Joliot-Curie

Wen Hui Long

Institute of Modern Physics

J. Margueron

Centre National de la Recherche Scientifique

N. Sandulescu

National Institute of Materials Physics

Haozhao Liang

The University of Tokyo

Cooperative Institutions

Centre National de la Recherche Scientifique

114

Institut National de Physique Nucléaire et de Physique des Particules

Institut de Physique

Université Paris-Saclay

Université Paris-Sud

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Istituto Nazionale di Fisica Nucleare

GANIL

CEA Paris-Saclay

Université Paris Cité

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Gamow-Teller Sum Rules in a Relativistic Nuclear Model

arXiv (Cornell University) (2003)

Haruki Kurasawa Toshio Suzuki Nguyen Van Giai

The issue of Gamow-Teller sum rule in atomic nuclei is reexamined in the framework of a relativistic description of nuclei. It is shown that the total Gamow-Teller strength in the nucleon sector is reduced by about 12% as compared to the prediction of a non-relativistic description. This reduction is due to the antinucleon degrees of freedom.

Atomic nucleus

Relativistic quantum chemistry

Source

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Influence of complex configurations on the properties of the pygmy dipole resonance in neutron-rich Ca isotopes

Physical review. C (2017)

N. N. Arsenyev A. P. Severyukhin V. V. Voronov Nguyen Van Giai

Starting from the quasiparticle random phase approximation based on the Skyrme interaction SLy5, we study the effects of phonon-phonon coupling (PPC) on the low-energy electric dipole response in $^{40\ensuremath{-}58}\mathrm{Ca}$. Using the same set of parameters we describe available experimental data for $^{40,44,48}\mathrm{Ca}$ and give the prediction for $^{50\ensuremath{-}58}\mathrm{Ca}$. The inclusion of the PPC results in the formation of low-energy ${1}^{\ensuremath{-}}$ states. There is an impact of the PPC effect on low-energy $E1$ strength of $^{40,44,48}\mathrm{Ca}$. The PPC effect on the electric dipole polarizability is discussed. We predict a strong increase of the summed $E1$ strength below 10 MeV, with increasing neutron number from $^{48}\mathrm{Ca}$ until $^{58}\mathrm{Ca}$.

Random phase approximation

10.1103/physrevc.95.054312

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Citations (17)

Lifetimes of monopole resonances in time-dependent Hartree-Fock theory

Physics Letters B (1987)

Ph. Chomaz Nguyen Van Giai S. Stringari

Particle (ecology)

10.1016/0370-2693(87)90643-5

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Citations (42)

Coulomb sum rules in the relativistic Fermi gas model

Physical Review C (1987)

G. Do Dang M. L’Huillier Nguyen Van Giai J. W. Van Orden

Coulomb sum rules are studied in the framework of the Fermi gas model. A distinction is made between mathematical and observable sum rules. Differences between nonrelativistic and relativistic Fermi gas predictions are stressed. A method to deduce a Coulomb response function from the longitudinal response is proposed and tested numerically. This method is applied to the $^{40}\mathrm{Ca}$ data to obtain the experimental Coulomb sum rule as a function of momentum transfer.

Momentum (technical analysis)

Thomas–Fermi model

10.1103/physrevc.35.1637

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Citations (26)

Study of the Breathing Mode ofPb208through Neutron Decay

Physical Review Letters (1988)

A. Bracco J. R. Beene Nguyen Van Giai P. F. Bortignon F. Zardi

The neutron decay of the giant monopole resonance region between 13 and 15 MeV in $^{208}\mathrm{Pb}$ is analyzed in terms of collective and statistical doorway states. The direct escape widths of the giant monopole resonance populating the lowest five valence hole states of $^{207}\mathrm{Pb}$ are determined, and compared with the results obtained from complex collective states. This comparison discriminates sharply between different model Hamiltonians which predict similar energies and collectivities for the resonance.

10.1103/physrevlett.60.2603

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Citations (51)

COMPLEX CONFIGURATION EFFECTS ON β-DECAY RATES

A. P. Severyukhin V. V. Voronov I. N. Borzov N. N. Arsenyev Nguyen Van Giai

10.1142/9789814699464_0037

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QRPA coordinate space calculations of 2+ states in N=20 isotones

Physics of Atomic Nuclei (2004)

Nguyen Van Giai M. Yamagami

Random phase approximation

10.1134/1.1802349

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PION- AND RHO-MESON EFFECTS IN RELATIVISTIC HARTREE-FOCK AND RPA

Nguyen Van Giai Weiwang Long Haozhao Liang J. Meng H. Sagawa

Hartree

10.1142/9789812776150_0061

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The Giant Dipole Resonance in Ar-Isotopes in the Relativistic RPA

Progress of Theoretical Physics (1997)

Zhiming Ma H. Toki Bin Chen Nguyen Van Giai

The isovector giant dipole resonance in Ar-isotopes is studied in the framework of the relativistic random phase approximation starting from effective Lagrangians originally proposed for describing nuclear ground states. The calculations are done with the parameter set TM1 which satisfactorily describes the ground states of stable and unstable nuclei up to the drip lines. It is found that the isovector dipole strength in nuclei near drip lines is split into two components: one peaks at the normal giant dipole energy, the other is located at low energy. The lower dipole state is due to the weakly bound neutron (or proton) excitation, which may cause large cross-sections in collisions with heavy nuclei by Coulomb excitation.

Isovector

Random phase approximation

Giant resonance

Isotopes of tin

10.1143/ptp.98.917

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Citations (15)

QUADRUPOLE EXCITATIONS IN NEUTRON-RICH OXYGEN ISOTOPES IN QRPA WITH SKYRME-TYPE INTERACTIONS

M. Yamagami E. Khan Nguyen Van Giai

10.1142/9789812703972_0027

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