scholarly journals GROUND STATES AND EXCITED STATES OF HYPERNUCLEI IN RELATIVISTIC MEAN FIELD APPROACH

2012 ◽  
Vol 21 (07) ◽  
pp. 1250069 ◽  
Author(s):  
BIPASHA BHOWMICK ◽  
ABHIJIT BHATTACHARYYA ◽  
G. GANGOPADHYAY
Keyword(s):  
Field Theory ◽  
Excited States ◽  
Single Particle ◽  
Mean Field Theory ◽  
Mean Field ◽  
Separation Energy ◽  
Field Approach ◽  
Relativistic Mean Field ◽  
Wide Range ◽  
Particle Spectra

Hypernuclei have been studied within the framework of Relativistic Mean Field theory. The force FSU Gold has been extended to include hyperons. The effective hyperon–nucleon and hyperon–hyperon interactions have been obtained by fitting experimental energies in a number of hypernuclei over a wide range of mass. Calculations successfully describe various features including hyperon separation energy and single particle spectra of single-Λ hypernuclei throughout the periodic table. We also extend this formalism to double-Λ hypernuclei.

MIRROR NUCLEI 12B AND 12N IN TIME-ODD TRIAXIAL RELATIVISTIC MEAN FIELD THEORY

2006 ◽  
Vol 15 (07) ◽  
pp. 1513-1521
Author(s):  
H. CHEN ◽  
H. MEI ◽  
J. MENG ◽  
J. M. YAO
Keyword(s):  
Field Theory ◽  
Mass Difference ◽  
Mean Field Theory ◽  
Mean Field ◽  
Coulomb Field ◽  
Meson Field ◽  
Relativistic Mean Field Theory ◽  
Nuclear Magnetism ◽  
Field Approach ◽  
Relativistic Mean Field

Properties of the odd-odd mirror nuclei 12 B and 12 N have been investigated in the time-odd triaxial relativistic mean field approach. Influences of the nuclear magnetism, the mass difference between neutron and proton, the isovector meson field ρ and the Coulomb field on the properties of mirror nuclei have been discussed in detail.

THE RELATIVISTIC MEAN FIELD THEORY AND LOW ENERGY QUADRUPOLE COLLECTIVE EXCITATIONS

2004 ◽  
Vol 13 (01) ◽  
pp. 217-224 ◽  
Author(s):  
L. PRÓCHNIAK ◽  
P. RING
Keyword(s):  
Field Theory ◽  
Experimental Data ◽  
Single Particle ◽  
Mean Field Theory ◽  
Mean Field ◽  
Low Energy ◽  
Collective Excitations ◽  
Relativistic Mean Field ◽  
Calculated Mass ◽  
Theoretical Results

We present an attempt to describe low lying quadrupole collective excitations within the frame of the RMF theory. Single particle wavefunctions obtained from the RMF are used to calculate mass parameters in the cranking approximation of the ATDHFB. The general Bohr hamiltonian with the calculated mass parameters yields collective energies and wavefunctions. Theoretical results are compared with the experimental data in the case of the γ soft 110 Ru and 126 Ba nuclei.

TEMPERATURE DEPENDENCE OF NUCLEAR STRUCTURE IN THE RELATIVISTIC MEAN-FIELD THEORY WITH A NEW PARAMETER SET

2004 ◽  
Vol 13 (06) ◽  
pp. 1147-1155 ◽  
Author(s):  
BOŻENA NERLO-POMORSKA ◽  
KRZYSZTOF POMORSKI ◽  
JOANNA SYKUT ◽  
JOHAN BARTEL
Keyword(s):  
Field Theory ◽  
Single Particle ◽  
Level Density ◽  
Mean Field Theory ◽  
Mean Field ◽  
Relativistic Mean Field Theory ◽  
Level Densities ◽  
Relativistic Mean Field ◽  
Single Particle Level ◽  
Particle Level

A new set of relativistic mean-field theory (RMFT) parameters, NL4, ensuring a better description of the average nuclear energy as given by the new Lublin–Strasbourg mass formula, is used in a self-consistent description of 171 spherical even-even nuclei at temperatures 0≤T≤4 MeV. Single-particle level densities for this sample of nuclei are determined by analyzing the data obtained for various temperatures. The average dependence of the single-particle level density on mass number A and isospin is given and compared with previous estimates obtained using the RMFT-NL3, Thomas–Fermi and semiclassical Skyrme SkM* approaches.

HALO IN THE EXCITED STATES FOR N = 41 ISOTONES

2006 ◽  
Vol 21 (36) ◽  
pp. 2751-2761
Author(s):  
MIAO YU ◽  
PENG-FEI ZHANG ◽  
TU-NAN RUAN ◽  
JIAN-YOU GUO
Keyword(s):  
Field Theory ◽  
Excited State ◽  
Excited States ◽  
Mean Field Theory ◽  
Mean Field ◽  
Binding Energies ◽  
Neutron Halo ◽  
Relativistic Mean Field Theory ◽  
Relativistic Mean Field ◽  
First Excited State

The properties of N = 41 isotones are investigated systemically by using the nonlinear relativistic mean field theory. It is found that all the calculating binding energies with four different interactions are comparable for the ground and low-lying excited states, and very close to the data available. The calculations show that there exists a neutron halo in the first excited state in 69 Ni , as well as in the second excited state in 69 Ni . It is also predicted that there exists a neutron halo in the first excited state in 65 Cr , 66 Mn , 67 Fe and 68 Co .

SHAPE EVOLUTION FOR Ce ISOTOPES IN RELATIVISTIC MEAN-FIELD THEORY

2006 ◽  
Vol 15 (04) ◽  
pp. 939-950 ◽  
Author(s):  
MIAO YU ◽  
PENG-FEI ZHANG ◽  
TU-NAN RUAN ◽  
JIAN-YOU GUO
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Shape Evolution ◽  
Relativistic Mean Field Theory ◽  
Potential Surfaces ◽  
Relativistic Mean Field ◽  
Self Consistent ◽  
Particle Spectra ◽  
Clear Change

The evolution of shape from the axially deformed to the spherical shapes in the Ce isotopes is investigated microscopically in relativistic mean-field theory. The microscopic and self-consistent quadruple deformation constrained relativistic mean-field calculations show a clear change for the even-even Ce isotopes with N = 62 ~ 84. The potential surfaces for 128 Ce , 130 Ce , 132 Ce and 134 Ce are found to be relatively flat, which may be the possible critical-point nuclei. Similar conclusions can also be drawn from the microscopic single-particle spectra.

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