scholarly journals Probing the sensitivity of the total nucleus-nucleus reaction cross section at intermediate energies to medium effects and isospin asymmetries

2011 ◽  
Vol 83 (6) ◽  
Author(s):  
Francesca Sammarruca ◽  
Larz White
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Medium Effects ◽  
Intermediate Energies

scholarly journals The behavior of reaction cross-section at low and intermediate energies by considering in-medium effects in σNN for light and heavy target nuclei

2010 ◽  
Vol 7 (1) ◽  
pp. 145-151
Author(s):  
H. El-Gebaly
Keyword(s):  
Simple Model ◽  
Cross Section ◽  
Target Nucleus ◽  
Reaction Cross Section ◽  
Incident Energy ◽  
Nucleon Nucleon ◽  
Reaction Cross ◽  
Medium Effects ◽  
Heavy Target ◽  
Intermediate Energies

The in-medium effects in nucleon-nucleon cross-section were treated using different approaches. We study the variation of σR with different values of rms. Also we study the variation of sR with different values of incident energy per projectile nucleon for light interacting pair 12C-12C and heavy target nucleus pair12C-208Pb. The coulombs repulsion was taken into consideration by assuming a simple model. We found that the in-medium effects on σR are small when the target nucleus becomes heavy.

The effect of level density and reaction mechanisms on the reaction cross-section calculations at intermediate energies

1999 ◽  
Vol 112 (7) ◽  
pp. 743-760 ◽  
Author(s):  
V. P. Lunev ◽  
Yu. N. Shubin ◽  
C. Grandi ◽  
B. Poli ◽  
A. Ventura
Keyword(s):  
Cross Section ◽  
Reaction Mechanisms ◽  
Reaction Cross Section ◽  
Level Density ◽  
Reaction Cross ◽  
Intermediate Energies

Measurement of reaction cross section for proton-rich nuclei (A<30) at intermediate energies

2002 ◽  
Vol 707 (3-4) ◽  
pp. 303-324 ◽  
Author(s):  
H.Y. Zhang ◽  
W.Q. Shen ◽  
Z.Z. Ren ◽  
Y.G. Ma ◽  
W.Z. Jiang ◽  
...  
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Intermediate Energies

POSSIBLE EXOTIC STRUCTURE IN LIGHT PROTON-RICH NUCLEI

2003 ◽  
Vol 18 (02n06) ◽  
pp. 151-161 ◽  
Author(s):  
H. Y. ZHANG ◽  
W. Q. SHEN ◽  
Y. G. MA ◽  
X. Z. CAI ◽  
D. Q. FANG ◽  
...  
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Drip Line ◽  
Projectile Fragmentation ◽  
Transmission Method ◽  
Carbon Target ◽  
Halo Structure ◽  
Intermediate Energies ◽  
Proton Halo

Radioactive ion beams were produced through the projectile fragmentation induced by 69MeV/nucleon 36 Ar primary beam on a 9 Be target. Measurements of reaction cross section (σR) for some proton-rich nuclei on carbon target at intermediate energies around 30MeV/nucleon have been performed on RIBLL of HIRFL by transmission method and transmission plus transportation method. The experimental σR values for 23Al and 27P are abnormally large compared with their neighboring nuclei and that of 17F has an enhancement compared with the neighboring isotopes. It suggests anomalously large matter root-mean-square radii and proton halo structure in 23 Al and 27 P . The experimental σR values and momentum distribution of fragmentation reaction product for 31 Cl , 32 Cl , 33 Cl , 28 S , 29 S were performed also on RIBLL by transmission and transportation method. These data are in analyzing. The calculation of relativistic density-dependent Hartree shows that the nuclei 23 Al , 27 P , 31 Cl may have proton-halo structure and 17F, 32Cl may have proton-skin structure. New experiment on the search for new nuclides 25 P and 26 S in proton drip line is also described. The significance of these measurements and possible proton halo and skin for light proton-rich nuclei has been discussed.

Fermi motion and medium effects on reaction cross sections of 13,14,15B + C, Al at intermediate and high energies

2020 ◽  
Vol 35 (36) ◽  
pp. 2050297
Author(s):  
M. Rashdan ◽  
T. A. Abdel-Karim
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Glauber Model ◽  
Total Reaction Cross Section ◽  
Boron Isotopes ◽  
Medium Effects ◽  
Fermi Motion ◽  
Reaction Cross Sections

Analysis of reaction cross sections of [Formula: see text] are performed with Glauber model (GM) including medium modifications arising from Fermi motion and in-medium nucleon–nucleon (NN) total reaction cross section. The density distributions of Boron isotopes are described by a deformed-average Fermi shape, whose proton and neutron radii and deformation parameters are derived from relativistic mean field (RMF), harmonic oscillator (HO) and two-parameter Fermi (2pF). These densities can describe the reaction cross section of Boron isotopes except for [Formula: see text] which is better described by an HO core plus extended Gaussian (HOG) or HO plus a modified Yukawa (HOMY) tail, which depends on the 1n separation energy. It is found that Fermi motion effects dominated at intermediate energy, and they are important to describe the data in addition to in-medium effects. In-medium effects, which are incorporated locally, reduced the reaction cross section by about 3–5% at all energies. [Formula: see text] is confirmed as a one-neutron halo nucleus, where a large extended tail is observed in the extracted HOMY and HOG model densities as well as in the extracted radii, where the matter radius of [Formula: see text] is found to be about 2.92 fm, which is larger than that of [Formula: see text] (2.5 fm) and [Formula: see text] (2.82 fm) predicted using the GM model including Fermi motion and in-medium effects.

An Am/Be neutron source and its use in integral tests of differential neutron reaction cross-section data

2010 ◽  
Vol 68 (9) ◽  
pp. 1656-1661 ◽  
Author(s):  
M.S. Uddin ◽  
M.R. Zaman ◽  
S.M. Hossain ◽  
I. Spahn ◽  
S. Sudár ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Source ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Cross Section Data ◽  
Section Data ◽  
Neutron Reaction
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