INVESTIGATIONS ON THE NUCLEAR HALO STRUCTURES

2008 ◽  
Vol 17 (09) ◽  
pp. 1729-1738
Author(s):  
YU-JIE LIANG ◽  
ZU-HUA LIU ◽  
HONG-YU ZHOU
Keyword(s):  
Mean Field ◽  
Light Nuclei ◽  
Halo Nuclei ◽  
Asymptotic Normalization ◽  
Relativistic Mean Field ◽  
Asymptotic Normalization Coefficient ◽  
Nuclear Halo ◽  
Coulomb Effects ◽  
Qualitative Analyses

The halo structures in some light nuclei are investigated systemically with the nuclear asymptotic normalization coefficient (ANC) method and the relativistic mean-field (RMF) theory. Some important results about the halo structures in mirror nuclei are obtained, and some qualitative analyses are made to explore the role of Coulomb effects on the formation of proton halo nuclei.

ASYMPTOTIC NORMALIZATION COEFFICIENTS FOR 7Be(p, γ)8B FROM RMF CALCULATION

2009 ◽  
Vol 24 (18) ◽  
pp. 1453-1460 ◽  
Author(s):  
CHENGBIN WANG ◽  
TIEKUANG DONG ◽  
Z. Y. ZHU ◽  
ZHONGZHOU REN
Keyword(s):  
Cross Sections ◽  
Single Particle ◽  
Mean Field ◽  
Drip Line ◽  
Mean Square ◽  
Asymptotic Normalization ◽  
Halo Structure ◽  
Relativistic Mean Field ◽  
Asymptotic Normalization Coefficient ◽  
Structure Properties

The asymptotic normalization coefficient (ANC) method is used to determine the cross sections of peripheral reactions at astrophysical energies because of existence of the Coulomb barriers. In this paper, we address an estimation of the ANC of 8 B with its single particle wavefunction obtained within the framework of relativistic mean field (RMF) theory. We test the force parameters used in the RMF theory by comparing the calculated structure properties of A = 7–9 drip-line nuclei with experimental results. Utilizing the corrected bound wavefunction of 8 B , the ANC [Formula: see text] is obtained and that indicates the S17(0) is 18.07 eV b. Additionally, we find that the root-mean-square (rms) radius for the loosely bound proton in 8 B is 3.98 fm. This confirms that 8 B has a proton halo structure.

THE ROLE OF THE NUCLEAR MATTER COMPRESSION MODULUS IN NEUTRON STARS

2004 ◽  
Vol 13 (07) ◽  
pp. 1519-1524 ◽  
Author(s):  
VERÔNICA A. DEXHEIMER ◽  
CÉSAR A. Z. VASCONCELLOS ◽  
MOISÉS RAZEIRA ◽  
MANFRED DILLIG
Keyword(s):  
Neutron Stars ◽  
Nuclear Matter ◽  
Body Problem ◽  
Mean Field Theory ◽  
Mean Field ◽  
Compression Modulus ◽  
Baryon Number ◽  
Many Body ◽  
Relativistic Mean Field

For the nuclear many body problem at high densities, formulated in the framework of a relativistic mean-field theory, we investigate in detail the compression modulus of nuclear matter as a function of the effective nucleon mass. We include consistently in our modelling chemical equilibrium as well as baryon number and electric charge conservation and investigate properties of neutron stars. Among other predictions we focus on the dependence of the maximum mass of a sequence of neutron stars as a function of the compression modulus and the nucleon effective mass.

scholarly journals Novel feature of doubly bubble nuclei in 50 ≤ Z(N) ≤ 82 region along with magicity and weakly bound structure

2020 ◽  
Vol 29 (08) ◽  
pp. 2050068
Author(s):  
M. Kumawat ◽  
G. Saxena ◽  
M. Kaushik ◽  
S. K. Jain ◽  
J. K. Deegwal ◽  
...  
Keyword(s):  
Mean Field ◽  
Central Density ◽  
Neutron Density ◽  
Weakly Bound ◽  
Density Profiles ◽  
Relativistic Mean Field ◽  
Density Depletion ◽  
Shell Closures ◽  
Neutron Density Distribution

In this work, we identify a unique and novel feature of central density depletion in both proton and neutron named as doubly bubble nuclei in [Formula: see text] region. The major role of 2d-3s single-particle (s.p.) states in the existence of halo and bubble nuclei is probed. The occupancy in s.p. state 3s[Formula: see text] leads to the extended neutron density distribution or halo while the unoccupancy results in the central density depletion. By employing the Relativistic Mean-Field (RMF) approach along with NL3* parameter, the separation energies, s.p. energies, pairing energies, proton and neutron density profiles along with deformations of even–even nuclei are investigated. Our results are concise with few other theories and available experimental data. Emergence on new shell closure and the magicity of conventional shell closures are explored systematically in this yet unknown region.

EXOTIC NUCLEAR STRUCTURES WITH ISOSPIN DEPENDENT INTERACTIONS IN RELATIVISTIC MEAN-FIELD MODELS

2006 ◽  
Vol 15 (07) ◽  
pp. 1487-1494
Author(s):  
W. Z. JIANG
Keyword(s):  
Mean Field ◽  
Exotic Nuclei ◽  
Heavy Nuclei ◽  
Charge Density Distribution ◽  
Tensor Coupling ◽  
Relativistic Mean Field ◽  
Mean Field Models ◽  
Coupling Terms ◽  
Nuclear Structures

The properties of light exotic nuclei far off β-stability are studied using relativistic mean field (RMF) models considering the nonlinear isoscalar-isovector coupling terms that modify the density dependence of the symmetry energy. The ρNN tensor coupling is included. The neutron thickness of some light exotic nuclei near neutron drip lines is as uncertain as that of heavy nuclei. The uncertainty of these light exotic nuclei is enhanced by the inclusion of the ρNN tensor coupling subject to the 2s1/2 occupation of the out-layer neutrons. The charge density distribution of exotic nuclei on both sides of drip lines are considerably modified by the isospin dependent interactions. The role of multi-Λ hypernuclei in extending the drip lines are discussed.

Study of halo nuclei with phenomenological relativistic mean field approach

1994 ◽  
Vol 328 (1-2) ◽  
pp. 1-4 ◽  
Author(s):  
Z.Y. Zhu ◽  
W.Q. Shen ◽  
Y.H. Cai ◽  
Y.G. Ma
Keyword(s):  
Mean Field ◽  
Halo Nuclei ◽  
Field Approach ◽  
Relativistic Mean Field

scholarly journals Instabilities of relativistic mean field models and the role of nonlinear terms

2007 ◽  
Vol 76 (4) ◽  
Author(s):  
A. Sulaksono ◽  
T. Mart ◽  
T. J. Bürvenich ◽  
J. A. Maruhn
Keyword(s):  
Mean Field ◽  
Relativistic Mean Field ◽  
Mean Field Models
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