scholarly journals Nuclear charge-exchange excitations based on a relativistic density-dependent point-coupling model

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
D. Vale ◽  
Y. F. Niu ◽  
N. Paar
Keyword(s):  
Charge Exchange ◽  
Nuclear Charge ◽  
Coupling Model ◽  
Density Dependent ◽  
Dependent Point

scholarly journals Shell evolution in neutron-rich Ge, Se, Kr and Sr nuclei within RHB approach

2020 ◽  
pp. 2050089
Author(s):  
M. El Adri ◽  
M. Oulne
Keyword(s):  
Energy Surface ◽  
Magic Number ◽  
Theoretical Models ◽  
Meson Exchange ◽  
Pairing Energy ◽  
Droplet Model ◽  
Energy Potential ◽  
Density Dependent ◽  
Number Formula ◽  
Dependent Point

The exotic even–even isotopic chains from [Formula: see text] to [Formula: see text] are investigated by means of the relativistic Hartree–Bogoliubov (RHB) approach with the explicit Density Dependent Meson-Exchange (DD-ME2) and Density-Dependent Point-Coupling (DD-PC1) models. The classic magic number [Formula: see text] is reproduced and the new number [Formula: see text] is predicted to be a robust shell closure by analysing several calculated quantities such as: two-neutron separation energies, two-neutron shell gap, neutron pairing energy, potential energy surface and neutron single particle energies. The obtained results are compared with the predictions of finite range droplet model (FRDM) and with the available experimental data. A reasonable and satisfactory agreement between the theoretical models and experiment is established.

Nuclear charge-exchange corrections to leptonic pion production in the (3, 3)-resonance region

1974 ◽  
Vol 9 (7) ◽  
pp. 2125-2143 ◽  
Author(s):  
Stephen L. Adler ◽  
Shmuel Nussinov ◽  
E. A. Paschos
Keyword(s):  
Charge Exchange ◽  
Pion Production ◽  
Nuclear Charge ◽  
Resonance Region

scholarly journals Nuclear charge-exchange excitations in localized covariant density functional theory

2014 ◽  
Vol 66 ◽  
pp. 02064 ◽  
Author(s):  
H. Z. Liang ◽  
J. Meng ◽  
T. Nakatsukasa ◽  
Z. M. Niu ◽  
P. Ring ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Charge Exchange ◽  
Density Functional ◽  
Nuclear Charge ◽  
Functional Theory ◽  
Covariant Density Functional Theory ◽  
Covariant Density

scholarly journals NUCLEON SIGMA TERM AND IN-MEDIUM QUARK CONDENSATE IN THE MODIFIED Quark–MESON COUPLING MODEL

1999 ◽  
Vol 14 (04) ◽  
pp. 289-297 ◽  
Author(s):  
XUEMIN JIN ◽  
MANUEL MALHEIRO
Keyword(s):  
Chiral Symmetry ◽  
Linear Order ◽  
Coupling Model ◽  
Quark Condensate ◽  
Chiral Symmetry Restoration ◽  
Density Dependent ◽  
Sigma Term ◽  
Meson Coupling ◽  
Model Independent ◽  
Bag Constant

We evaluate the nucleon sigma term and in-medium quark condensate in the modified quark–meson coupling model which features a density-dependent bag constant. We obtain a nucleon sigma term consistent with its empirical value, which requires a significant reduction of the bag constant in the nuclear medium similar to those found in the previous works. The resulting in-medium quark condensate at low densities agrees well with the model-independent linear order result. At higher densities, the magnitude of the in-medium quark condensate tends to increase, indicating no tendency towards chiral symmetry restoration.

scholarly journals Physical origin of density dependent forces of Skyrme type within the quark meson coupling model

2006 ◽  
Vol 772 (1-2) ◽  
pp. 1-19 ◽  
Author(s):  
P.A.M. Guichon ◽  
H.H. Matevosyan ◽  
N. Sandulescu ◽  
A.W. Thomas
Keyword(s):  
Coupling Model ◽  
Physical Origin ◽  
Density Dependent ◽  
Meson Coupling

Erratum: Nuclear charge-exchange corrections to leptonic pion production in the (3,3)-resonance region

1974 ◽  
Vol 10 (5) ◽  
pp. 1669-1669
Author(s):  
Stephen L. Adler ◽  
Shmuel Nussinov ◽  
E. A. Paschos
Keyword(s):  
Charge Exchange ◽  
Pion Production ◽  
Nuclear Charge ◽  
Resonance Region

Charge exchange response functions of finite nucleus by an extended Skyrme interaction

2014 ◽  
Vol 23 (06) ◽  
pp. 1460001
Author(s):  
Pei-Wei Wen ◽  
Li-Gang Cao
Keyword(s):  
Spin Density ◽  
Response Function ◽  
Charge Exchange ◽  
Random Phase ◽  
Specific Effect ◽  
Skyrme Interaction ◽  
Finite Nucleus ◽  
Density Dependent ◽  
Hartree Fock ◽  
Peak Energy

The charge exchange resonances in finite nucleus, such as Gamow–Teller (GT) and Spin-Dipole (SD) resonances, have been studied in a self-consistent Hartree–Fock (HF) plus random phase approximation (RPA) approach by employing an extended Skyrme interaction with spin-density dependent terms. The calculations are performed within the KDE0v1 and KDE0v1st Skyrme interactions. The peak energy of GT response function is increased by about 1.4 MeV when the spin-density dependent terms are included. For total response function of SD resonance, the spin-density dependent terms give an overall repulsive contribution to the strength. The specific effect for each multipole presents a multipole dependence.

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