Reaction cross sections of intermediate energy α particles within a relativistic optical model

1995 ◽  
Vol 52 (1) ◽  
pp. 415-417 ◽  
Author(s):  
S. Ait-Tahar ◽  
Y. Nedjadi
Keyword(s):  
Cross Sections ◽  
Optical Model ◽  
Intermediate Energy ◽  
Reaction Cross ◽  
Reaction Cross Sections ◽  
Α Particles

New results for reaction cross sections of intermediate energy α-particles on targets from Be to Pb

2000 ◽  
Vol 676 (1-4) ◽  
pp. 3-31 ◽  
Author(s):  
A. Ingemarsson ◽  
J. Nyberg ◽  
P.U. Renberg ◽  
O. Sundberg ◽  
R.F. Carlson ◽  
...  
Keyword(s):  
Cross Sections ◽  
Intermediate Energy ◽  
Reaction Cross ◽  
Reaction Cross Sections ◽  
Α Particles

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.

scholarly journals 7Be and 8B reaction dynamics at Coulomb barrier energies

2018 ◽  
Vol 184 ◽  
pp. 02015
Author(s):  
E. Strano ◽  
M. Mazzocco ◽  
A. Boiano ◽  
C. Boiano ◽  
M. La Commara ◽  
...  
Keyword(s):  
Cross Sections ◽  
Coulomb Barrier ◽  
Reaction Cross Section ◽  
Optical Model ◽  
Reaction Dynamics ◽  
Reaction Cross ◽  
Total Reaction Cross Section ◽  
Weakly Bound ◽  
Total Reaction ◽  
Reaction Cross Sections

We investigated the reaction dynamics induced by the 7Be,8B+208Pb collisions at energies around the Coulomb barrier. Charged particles originated by both the col- lisions were detected by means of 6 ΔE-Eres telescopes of a newly developed detector array. Experimental data were analysed within the framework of the Optical Model and the total reaction cross-sections were compared together and with the 6,7Li+208Pb colli-sion data. According to the preliminary results, 7Be nucleus reactivity is rather similar to the 7Li one whereas the 8B+208Pb total reaction cross section appears to be much larger than those measured for reactions induced by the other weakly-bound projectiles on the same target.

Total reaction cross-sections determined from elastic scattering of α-particles on Br

1979 ◽  
Vol 25 (16) ◽  
pp. 481-484 ◽  
Author(s):  
G. Lanzanò ◽  
G. Mazza ◽  
F. Porto ◽  
S. Sambataro
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Reaction Cross ◽  
Total Reaction ◽  
Reaction Cross Sections ◽  
Α Particles

Reaction cross sections of intermediate energy 3He-particles on targets from 9Be to 208Pb

2001 ◽  
Vol 696 (1-2) ◽  
pp. 3-30 ◽  
Author(s):  
A. Ingemarsson ◽  
G.J. Arendse ◽  
A. Auce ◽  
R.F. Carlson ◽  
A.A. Cowley ◽  
...  
Keyword(s):  
Cross Sections ◽  
Intermediate Energy ◽  
Reaction Cross ◽  
Reaction Cross Sections

New Evaluated Semi-Empirical Formula Using Optical Model for 14–15 MeV (n, t) Reaction Cross Sections

2009 ◽  
Vol 28 (4) ◽  
pp. 377-384 ◽  
Author(s):  
E. Tel ◽  
C. Durgu ◽  
A. Aydın ◽  
M. H. Bölükdemir ◽  
A. Kaplan ◽  
...  
Keyword(s):  
Cross Sections ◽  
Empirical Formula ◽  
Optical Model ◽  
Reaction Cross ◽  
Semi Empirical ◽  
Reaction Cross Sections

scholarly journals Thermonuclear Reaction Rates for Reactions Leading to N = 28 Nuclei

1995 ◽  
Vol 48 (1) ◽  
pp. 125
Author(s):  
A.J Morton ◽  
DG Sargood
Keyword(s):  
Statistical Model ◽  
Nuclear Reaction ◽  
Cross Sections ◽  
Optical Model ◽  
Reaction Rates ◽  
Reaction Cross ◽  
Model Parameters ◽  
Thermonuclear Reaction ◽  
Model Calculations ◽  
Reaction Cross Sections

Nuclear reaction cross sections derived from statistical-model calculations have been used in the calculation of thermonuclear reaction rates for 36 nuclei at temperatures that are representative of the interiors of evolving stars and supernovae as nucleosynthesis approaches the production of nuclei with N = 28. The statistical-model calculations used optical-model parameters in the particle channels which had been selected to give the best overall agreement between theoretical and experimental cross sections for reactions on stable target nuclei in the mass and energy ranges of importance for the stellar conditions of interest. The optical-model parameters used, and the stellar reaction rates obtained, are tabulated. Comparisons are made between these stellar rates and those from other statistical-model calculations in the literature.

Trends of total reaction cross sections for heavy ion collisions in the intermediate energy range

1987 ◽  
Vol 35 (5) ◽  
pp. 1678-1691 ◽  
Author(s):  
S. Kox ◽  
A. Gamp ◽  
C. Perrin ◽  
J. Arvieux ◽  
R. Bertholet ◽  
...  
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Intermediate Energy ◽  
Reaction Cross ◽  
Total Reaction ◽  
Ion Collisions ◽  
Reaction Cross Sections

Average reaction cross sections for 74- to 112-MeV α particles onI127andCs133

1991 ◽  
Vol 43 (3) ◽  
pp. 1313-1317 ◽  
Author(s):  
R. E. Warner ◽  
H. W. Wilschut ◽  
W. F. Rulla ◽  
G. N. Felder
Keyword(s):  
Cross Sections ◽  
Reaction Cross ◽  
Reaction Cross Sections ◽  
Α Particles
Sign in / Sign up

Export Citation Format

Share Document