scholarly journals (K-,  -) Reaction Cross Sections with Microscopic Cluster-Model Wave Functions for Light p-Shell Hypernuclei

1984 ◽  
Vol 71 (1) ◽  
pp. 222-225 ◽  
Author(s):  
T. Motoba ◽  
H. Bando ◽  
K. Ikeda
Keyword(s):  
Cross Sections ◽  
Cluster Model ◽  
Reaction Cross ◽  
Wave Functions ◽  
Model Wave ◽  
Reaction Cross Sections

scholarly journals Density distributions, form factors and reaction cross sections for exotic 11Be and 15C nuclei

2019 ◽  
Vol 12 (24) ◽  
pp. 10-24
Author(s):  
Ahmed N. Abdullah
Keyword(s):  
Cross Sections ◽  
Single Particle ◽  
Ground State ◽  
Form Factors ◽  
Reaction Cross ◽  
Exotic Nuclei ◽  
Wave Functions ◽  
Proton Form ◽  
Proton Form Factors ◽  
Reaction Cross Sections

The ground state proton, neutron and matter densities of exotic 11Be and 15C nuclei are studied by means of the TFSM and BCM. In TFSM, the calculations are based on using different model spaces for the core and the valence (halo) neutron. Besides single particle harmonic oscillator wave functions are employed with two different size parameters  Bc and Bv.  In BCM, the halo nucleus is considered as a composite projectile consisting of core and valence clusters bounded in a state of relative motion. The internal densities of the clusters are described by single particle Gaussian wave functions.  Elastic electron scattering proton form factors for these exotic nuclei are analyzed via the plane wave born approximation (PWBA). As the calculations in the BCM do not distinguish between protons and neutrons, the calculations of the proton form factors are restricted only by the TFSM. The reaction cross sections for these exotic nuclei are studied by means of the Glauber model with an optical limit approximation using the ground state densities of the projectile and target, where these densities are described by single Gaussian functions. The calculated reaction cross sections at high energy are in agreement with the experimental data.

scholarly journals PION DOUBLE CHARGE EXCHANGE REACTIONS LEADING TO DOUBLE PIONIC ATOMS

1992 ◽  
Vol 07 (32) ◽  
pp. 2991-2998 ◽  
Author(s):  
J. NIEVES ◽  
E. OSET ◽  
S. HIRENZAKI ◽  
H. TOKI ◽  
M.J. VICENTE-VACAS
Keyword(s):  
Charge Exchange ◽  
Cross Sections ◽  
Reaction Cross ◽  
Wave Functions ◽  
Exchange Reactions ◽  
Double Charge Exchange ◽  
Pionic Atom ◽  
Pionic Atoms ◽  
Double Charge ◽  
Reaction Cross Sections

We study theoretically pion double charge exchange reactions leading to double pionic atoms. The reaction cross-sections with two pions in the deeper bound pionic orbits in 208Pb are calculated with realistic pionic atom wave functions and distortion effects. The cross-sections are found to be d2σ/dEdΩ~10−3−10−4 µ b/srMeV , which are only a small fraction of the double charge exchange background.

scholarly journals CLUSTER MODEL FOR REACTIONS INDUCED BY WEAKLY BOUND AND/OR EXOTIC HALO NUCLEI WITH MEDIUM-MASS TARGETS

2011 ◽  
Vol 20 (04) ◽  
pp. 943-946 ◽  
Author(s):  
C. BECK ◽  
N. ROWLEY ◽  
P. PAPKA ◽  
S. COURTIN ◽  
M. ROUSSEAU ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Cluster Model ◽  
Reaction Cross ◽  
Halo Nuclei ◽  
Weakly Bound ◽  
Medium Mass ◽  
Transfer Channels ◽  
Reaction Cross Sections ◽  
Existing Data

An experimental overview of reactions induced by the stable, but weakly-bound nuclei 6 Li , 7 Li and 9 Be , and by the exotic, halo nuclei 6 He , 8 B , 11 Be and 17 F on medium-mass targets, such as 58 Ni , 59 Co or 64 Zn , is presented. Existing data on elastic scattering, total reaction cross sections, fusion, breakup and transfer channels are discussed in the framework of a CDCC approach taking into account the breakup degree of freedom.

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.

7,9,10Be elastic scattering and total reaction cross sections on a12C target

2011 ◽  
Vol 84 (3) ◽  
Author(s):  
J. C. Zamora ◽  
V. Guimarães ◽  
A. Barioni ◽  
A. Lépine-Szily ◽  
R. Lichtenthäler ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Reaction Cross ◽  
Total Reaction ◽  
Reaction Cross Sections

Calculation of proton total reaction cross sections for some target nuclei in incident energy range of 10–600 MeV

2010 ◽  
Vol 73 (10) ◽  
pp. 1700-1706 ◽  
Author(s):  
H. Büyükuslu ◽  
A. Kaplan ◽  
A. Aydin ◽  
E. Tel ◽  
G. Yıldırım
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Incident Energy ◽  
Reaction Cross ◽  
Total Reaction ◽  
Reaction Cross Sections
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