scholarly journals Effects of isovector scalar δ–meson on Λ–hypernuclei

2015 ◽  
Vol 24 (03) ◽  
pp. 1550019
Author(s):  
M. Ikram ◽  
S. K. Singh ◽  
S. K. Biswal ◽  
S. K. Patra
Keyword(s):  
Binding Energy ◽  
Single Particle ◽  
Energy Levels ◽  
Mean Field Theory ◽  
Mean Field ◽  
Particle Energy ◽  
Spin Orbit ◽  
Single Particle Energy ◽  
Relativistic Mean Field ◽  
Meson Coupling

We analyze the effects of δ–meson on hypernuclei within the framework of relativistic mean field theory. The δ–meson is included into the Lagrangian for hypernuclei. The extra nucleon–meson coupling (gδ) affects every piece of physical observables, like binding energy, radii and single-particle energies of hypernuclei. Magnitude of effects in hypernuclei is found to be relatively less than their normal nuclei because of the presence of Λ hyperon. Flipping of single-particle energy levels are observed with the strength of gδ in the considered hypernuclei as well as normal nuclei. The spin-orbit potentials are observed for considered hypernuclei and the effect of gδ on spin-orbit potentials is also analyzed. The calculated Λ binding energy (BΛ) are quite agreeable with experimental data. The sensitivity of BΛ for s- and p- orbitals with the strength of gδ is also analyzed. Lambda mean potential is investigated which is found to be consistent with other predictions.

scholarly journals Λ-hyperon interaction with nucleons

2014 ◽  
Vol 29 (19) ◽  
pp. 1450099 ◽  
Author(s):  
M. Ikram ◽  
S. K. Singh ◽  
S. K. Biswal ◽  
M. Bhuyan ◽  
S. K. Patra
Keyword(s):  
Energy Level ◽  
Neutron Energy ◽  
Symmetry Energy ◽  
Single Particle ◽  
Energy Levels ◽  
Mean Field ◽  
Particle Energy ◽  
Single Particle Energy ◽  
Relativistic Mean Field

We study the interaction of Λ-hyperon with proton and neutron inside a nucleus within the framework of relativistic mean field (RMF) formalism. The single-particle energy levels for some of the specific proton and neutron orbits are analyzed with the addition of Λ-successively. The neutron energy level is more deeper, because of decrease in symmetry energy due to substitution of neutron by Λ-hyperon.

scholarly journals Shape coexistence and parity doublet in Zr isotopes

2015 ◽  
Vol 24 (03) ◽  
pp. 1550017 ◽  
Author(s):  
Bharat Kumar ◽  
S. K. Singh ◽  
S. K. Patra
Keyword(s):  
Excited States ◽  
Single Particle ◽  
Energy Levels ◽  
Mean Field ◽  
Particle Energy ◽  
Shape Coexistence ◽  
Single Particle Energy ◽  
Parity Doublet

The ground and excited states properties of Zr isotopes are studied from proton to neutron drip lines using the relativistic (RMF) and nonrelativistic (SHF) mean-field formalisms with Bardeen–Cooper–Schrieffer (BCS) and Bogoliubov pairing, respectively. The well-known NL3* and SLy4 parameter sets are used in the calculations. We have found spherical ground and low-lying large deformed excited states in most of the isotopes. Several couples of Ωπ = 1/2± parity doublets configurations are noticed, while analyzing the single-particle energy levels of the large deformed configurations.

Shell-Tunneling Spectroscopy of the Single-Particle Energy Levels of Insulating Quantum Dots

Nano Letters ◽  
2001 ◽  
Vol 1 (10) ◽  
pp. 551-556 ◽  
Author(s):  
E. P. A. M. Bakkers ◽  
Z. Hens ◽  
A. Zunger ◽  
A. Franceschetti ◽  
L. P. Kouwenhoven ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Single Particle ◽  
Energy Levels ◽  
Tunneling Spectroscopy ◽  
Particle Energy ◽  
Single Particle Energy

scholarly journals TEMPERATURE DEPENDENCE OF THE NUCLEAR ENERGY IN RELATIVISTIC MEAN-FIELD THEORY

2005 ◽  
Vol 14 (03) ◽  
pp. 505-511 ◽  
Author(s):  
B. NERLO-POMORSKA ◽  
K. POMORSKI ◽  
J. SYKUT ◽  
J. BARTEL
Keyword(s):  
Single Particle ◽  
Level Density ◽  
Mean Field Theory ◽  
Mean Field ◽  
Correction Method ◽  
Shell Correction ◽  
Shell Effects ◽  
Relativistic Mean Field ◽  
Single Particle Level ◽  
Particle Level

Self-consistent relativistic mean-field (RMF) calculations with the NL3 parameter set were performed for 171 spherical even-even nuclei with 16≤A≤224 at temperatures in the range 0≤T≤4 MeV . For this sample of nuclei single-particle level densities are determined by analyzing the data obtained for various temperatures. A new shell-correction method is used to evaluate shell effects at all temperatures. The single-particle level density is expressed as function of mass number A and relative isospin I and compared with previous estimates.

DELTA MATTER FORMATION IN DENSE ASYMMETRIC NUCLEAR MEDIUM

2000 ◽  
Vol 15 (24) ◽  
pp. 1529-1537 ◽  
Author(s):  
J. C. T. DE OLIVEIRA ◽  
M. KYOTOKU ◽  
M. CHIAPPARINI ◽  
H. RODRIGUES ◽  
S. B. DUARTE
Keyword(s):  
Nuclear Matter ◽  
Mean Field Theory ◽  
Mean Field ◽  
Symmetric Nuclear Matter ◽  
Coupling Constants ◽  
Nuclear Medium ◽  
Delta Resonance ◽  
Relativistic Mean Field ◽  
Meson Coupling ◽  
Resonance Coupling

In the context of a relativistic mean field theory the delta-resonance matter formation in a highly compressed nuclear medium is investigated. For a given set of nucleon–meson coupling constants, the delta-resonance formation is studied by changing the delta-meson coupling constants. The effect on the equation of state and on the delta-resonance population with respect to changes in the delta-resonance coupling constants values is discussed for very asymmetric and quasi-symmetric nuclear matter, as an extension of works restricted to the symmetric nuclear matter treatment.5,6

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