scholarly journals Reaction cross sections for proton scattering from stable and unstable nuclei based on a microscopic approach

2007 ◽  
Vol 76 (3) ◽  
Author(s):  
H. F. Arellano ◽  
M. Girod
Keyword(s):  
Cross Sections ◽  
Reaction Cross ◽  
Proton Scattering ◽  
Microscopic Approach ◽  
Unstable Nuclei ◽  
Reaction Cross Sections

scholarly journals Microscopie Calculations of Nuclear Level Densities and Astrophysical Applications

2019 ◽  
Vol 11 ◽  
Author(s):  
P. Demetriou ◽  
S. Goriely
Keyword(s):  
Cross Sections ◽  
Level Density ◽  
Reaction Cross ◽  
Neutron Resonance ◽  
Thermodynamic Quantities ◽  
Microscopic Approach ◽  
Level Densities ◽  
Hartree Fock ◽  
The Impact ◽  
Reaction Cross Sections

A new level density formula based on a microscopic calculation of the thermodynamic quantities using the deformed Hartree-Fock-BCS method is proposed. In the microscopic approach shell, pairing and deformation effects on the thermodynamic quantities are treated consistently. The final level density formula is shown to be in close agreement with experimental neutron resonance spacings and low energy states. The impact of the newly-determined level densities on nuclear reaction cross sections and rates of relevance in astrophysics applications is presented.

EXOTIC NUCLEAR STRUCTURES OF LIGHT UNSTABLE NUCLEI VIA REACTION CROSS SECTION MEASUREMENT

2010 ◽  
Vol 25 (21n23) ◽  
pp. 2014-2015
Author(s):  
D. NISHIMURA ◽  
M. FUKUDA ◽  
M. TAKECHI ◽  
M. MIHARA ◽  
J. KOMURASAKI ◽  
...  
Keyword(s):  
Cross Sections ◽  
Reaction Cross ◽  
Neutron Density ◽  
Nuclear Surface ◽  
Transmission Method ◽  
Density Distributions ◽  
Unstable Nuclei ◽  
Glauber Theory ◽  
Nuclear Structures ◽  
Reaction Cross Sections

Reaction cross sections for 11 Be and 8 B on proton targets at 40A - 120A MeV have been measured by the transmission method. With these data, we can discuss the proton- and neutron- density distributions at the nuclear surface independently in principle using the Glauber theory. Our experimental results support that the constituent of halo in 11 Be is neutron dominantly and that of 8 B is proton dominantly.

TOTAL REACTION CROSS SECTIONS OF LIGHT NEUTRON-RICH NUCLEI IN THE GLAUBER APPROXIMATION

2010 ◽  
Vol 25 (21n23) ◽  
pp. 1963-1966 ◽  
Author(s):  
AKIHISA KOHAMA ◽  
BADAWY ABU-IBRAHIM ◽  
WATARU HORIUCHI ◽  
SHOHEI IWASAKI ◽  
YASUYUKI SUZUKI
Keyword(s):  
Cross Sections ◽  
Reaction Cross ◽  
Numerical Results ◽  
Total Reaction ◽  
Unstable Nuclei ◽  
Reaction Cross Sections

We report our recent numerical results of total reaction cross sections of light neutron-rich nuclei, such as carbons and oxygens, in the Glauber approximation to study the exotic structure of neutron-rich unstable nuclei.

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.

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