scholarly journals Neutron-skin thickness of finite nuclei in relativistic mean-field models with chiral limits

2007 ◽  
Vol 76 (5) ◽  
Author(s):  
Wei-Zhou Jiang ◽  
Bao-An Li ◽  
Lie-Wen Chen
Keyword(s):  
Mean Field ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Relativistic Mean Field ◽  
Mean Field Models ◽  
Neutron Skin Thickness ◽  
Finite Nuclei

scholarly journals Study of the neutron skin thickness of208Pb in mean field models

2011 ◽  
Vol 321 ◽  
pp. 012052 ◽  
Author(s):  
X Roca-Maza ◽  
M Centelles ◽  
X Viñas ◽  
M Warda
Keyword(s):  
Mean Field ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Mean Field Models ◽  
Neutron Skin Thickness

NEUTRON SKIN THICKNESS IN NEUTRON-RICH NUCLEI: BULK AND SURFACE CONTRIBUTIONS AND SHELL EFFECTS

2012 ◽  
Vol 21 (05) ◽  
pp. 1250029 ◽  
Author(s):  
X. VIÑAS ◽  
M. WARDA ◽  
M. CENTELLES ◽  
X. ROCA-MAZA
Keyword(s):  
Mean Field ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Isotopic Chain ◽  
Effective Interactions ◽  
Shell Effects ◽  
Mean Field Models ◽  
Neutron Skin Thickness ◽  
Field Approaches ◽  
Two Parameter

We analyze theoretically the neutron skin thickness in nuclei and its correlation with the symmetry energy by using semiclassical and mean field approaches together with nuclear effective interactions. Semiclassical approaches reveal that the neutron skin thickness in nuclei is formed by a combination of bulk and surface contributions. To investigate the neutron skin thickness predicted by mean field models, we fit the corresponding densities by two-parameter Fermi distributions. Using these parametrized densities, we study the neutron skin thickness as well as its bulk and surface contributions in 208 Pb and in Zr isotopes, where the influence of shell effects along the isotopic chain is discussed.

scholarly journals Origin of the neutron skin thickness ofPb208in nuclear mean-field models

2010 ◽  
Vol 82 (5) ◽  
Author(s):  
M. Centelles ◽  
X. Roca-Maza ◽  
X. Viñas ◽  
M. Warda
Keyword(s):  
Mean Field ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Mean Field Models ◽  
Neutron Skin Thickness

Neutron skin thickness of finite nuclei with finite range effective interaction in droplet model

2018 ◽  
Vol 27 (06) ◽  
pp. 1850049 ◽  
Author(s):  
M. Pal ◽  
S. Chakraborty ◽  
B. Sahoo ◽  
S. Sahoo
Keyword(s):  
Symmetry Energy ◽  
Effective Interaction ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Droplet Model ◽  
Density Region ◽  
Neutron Skin Thickness ◽  
Number Formula ◽  
Energy Formula ◽  
Finite Nuclei

We analyze the relation between the symmetry energy coefficient [Formula: see text] of finite nuclei with mass number [Formula: see text] in the semi-empirical mass formula. The nuclear matter symmetry energy [Formula: see text] at reference density [Formula: see text] in the subsaturation density region can be determined by the symmetry energy [Formula: see text] and its density slope [Formula: see text] at the saturation density [Formula: see text]. From this relation, the neutron skin thickness ‘[Formula: see text]’ in finite nuclei with droplet model are correlated to the various symmetry energy parameters. A prominent role of the bulk symmetry energy [Formula: see text] to the so-called surface stiffness coefficient [Formula: see text] is observed in deriving the size of the neutron skin. Two types of neutron skins are distinguished: the “surface” and the “bulk”. The linear dependence of the neutron skin thickness for different stable nuclei ([Formula: see text]) on the slope [Formula: see text] of the symmetry energy as well as on the relative neutron excess [Formula: see text] is observed. Though the value of the surface width is found to be limited within 0.1[Formula: see text]fm, its contribution should not be neglected to measure neutron skin thickness.

Formation of α clusters in dilute neutron-rich matter

Science ◽  
2021 ◽  
Vol 371 (6526) ◽  
pp. 260-264 ◽  
Author(s):  
Junki Tanaka ◽  
Zaihong Yang ◽  
Stefan Typel ◽  
Satoshi Adachi ◽  
Shiwei Bai ◽  
...  
Keyword(s):  
Cross Sections ◽  
Cluster Formation ◽  
Reaction Cross ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Heavy Nuclei ◽  
Α Decay ◽  
Neutron Skin Thickness ◽  
Reaction Cross Sections ◽  
Α Particles

The surface of neutron-rich heavy nuclei, with a neutron skin created by excess neutrons, provides an important terrestrial model system to study dilute neutron-rich matter. By using quasi-free α cluster–knockout reactions, we obtained direct experimental evidence for the formation of α clusters at the surface of neutron-rich tin isotopes. The observed monotonous decrease of the reaction cross sections with increasing mass number, in excellent agreement with the theoretical prediction, implies a tight interplay between α-cluster formation and the neutron skin. This result, in turn, calls for a revision of the correlation between the neutron-skin thickness and the density dependence of the symmetry energy, which is essential for understanding neutron stars. Our result also provides a natural explanation for the origin of α particles in α decay.

Dependence of n/p with neutron skin thickness for neutron-rich nuclei

2010 ◽  
Vol 834 (1-4) ◽  
pp. 502c-504c ◽  
Author(s):  
X.Y. Sun ◽  
D.Q. Fang ◽  
Y.G. Ma ◽  
X.Z. Cai ◽  
X.G. Cao ◽  
...  
Keyword(s):  
Skin Thickness ◽  
Neutron Skin ◽  
Neutron Skin Thickness
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