Angular Momentum and Cross Sections for Fusion with Weakly Bound Nuclei: Breakup, a Coherent Effect

2002 ◽  
Vol 88 (17) ◽  
Author(s):  
Vandana Tripathi ◽  
A. Navin ◽  
K. Mahata ◽  
K. Ramachandran ◽  
A. Chatterjee ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Cross Sections ◽  
Weakly Bound ◽  
Coherent Effect

No-capture breakup and incomplete fusion reactions induced by stable weakly bound nucleus 9Be

2016 ◽  
Vol 25 (06) ◽  
pp. 1650043 ◽  
Author(s):  
S. A. Seyyedi
Keyword(s):  
Angular Momentum ◽  
Cross Sections ◽  
Coulomb Barrier ◽  
Fusion Reaction ◽  
Classical Trajectory ◽  
Breakup Reaction ◽  
Incomplete Fusion ◽  
Fusion Reactions ◽  
Weakly Bound ◽  
Barrier Energy

The reactions including the stable weakly bound nucleus 9Be have been studied using the classical trajectory model accompanied with the experimental breakup function and the Aage-Winther interaction potential (AW95). In these calculations, the no-capture breakup and the incomplete fusion cross-sections as well as their competition at around the Coulomb barrier have been investigated. Our calculations showed that at a given far-Coulomb-barrier energy the incomplete fusion reaction in different distributions of angular momentum and energies can dominate the no-capture breakup reaction. This dominating process is reversed at the near-barrier energies.

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.

THE STEREODYNAMICS STUDY OF THE C(3P) + OH (X2 Π) → CO(X1Σ+) + H(2S) REACTION

2010 ◽  
Vol 09 (05) ◽  
pp. 935-943 ◽  
Author(s):  
PENG SONG ◽  
YONG-HUA ZHU ◽  
JIAN-YONG LIU ◽  
FENG-CAI MA
Keyword(s):  
Angular Momentum ◽  
Cross Sections ◽  
Collision Energy ◽  
Energy Surface ◽  
Center Of Mass ◽  
Title Reaction ◽  
High Collision Energy ◽  
Dependency Relationship ◽  
Energy Dependency ◽  
Mass Frame

The stereodynamics of the title reaction on the ground electronic state X2A' potential energy surface (PES)1 has been studied using the quasiclassical trajectory (QCT) method. The commonly used polarization-dependent differential cross-sections (PDDCSs) of the product and the angular momentum alignment distribution, P(θr) and P(Φr), are generated in the center-of-mass frame using QCT method to gain insight of the alignment and orientation of the product molecules. Influence of collision energy on the stereodynamics is shown and discussed. The results reveal that the distribution of P(θr) and P(Φr) is sensitive to collision energy. The PDDCSs exhibit different collision energy dependency relationship at low and high collision energy ranges.

scholarly journals Fission cross sections as a probe of fusion dynamics at high angular momentum

2018 ◽  
Vol 98 (4) ◽  
Author(s):  
C. S. Palshetkar ◽  
D. J. Hinde ◽  
M. Dasgupta ◽  
E. Williams ◽  
K. Ramachandran ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Cross Sections ◽  
High Angular Momentum

Waldmann-Snider Collision Integrals and Nonspherical Molecular Interaction. I. Collision Integrals for Pure Gases

1974 ◽  
Vol 29 (12) ◽  
pp. 1705-1716 ◽  
Author(s):  
W. E. Köhler
Keyword(s):  
Angular Momentum ◽  
Cross Sections ◽  
Molecular Interaction ◽  
Scattering Amplitude ◽  
Collision Operator ◽  
Positive Definiteness ◽  
Collision Integrals ◽  
General Properties ◽  
Relaxation Coefficients ◽  
Rotational Angular Momentum

Collision integrals of the linearized Waldmann-Snider collision operator for pure gases are defined. General properties due to invariances of the molecular interaction are discussed. Effective cross sections are introduced and expressed in terms of convenient bracket symbols. The positive definiteness of the relaxation coefficients is proved. The approximation of small nonsphericity for the scattering amplitude is explained and consequences for the collision integrals are investigated. Molecular cross sections describing the orientation and reorientation of the molecular rotational angular momentum are defined. Expressions for effective cross sections relevant for the various nonequilibrium alignment phenomena are presented.

scholarly journals Main Results of Studying the Nature of the Irregularity of the Earth's Rotation

1979 ◽  
Vol 82 ◽  
pp. 61-64 ◽  
Author(s):  
N. S. Sidorenkov
Keyword(s):  
Angular Momentum ◽  
Cross Sections ◽  
Zonal Wind ◽  
Atmospheric Angular Momentum ◽  
Earth’S Rotation ◽  
Earth's Rotation ◽  
Relative Angular Momentum ◽  
Northern And Southern Hemispheres

The variations of the atmospheric angular momentum were investigated (Sidorenkov, 1976). Using the climatic cross-sections of the zonal wind, the values of the relative angular momentum of the atmosphere, h, were calculated for each month. The variations of h during the year are shown in Figure 1, where curve 1 illustrates the sum of h for the entire atmosphere, and curves 2 and 3 illustrate h for the atmospheres of the northern and southern hemispheres respectively.

Notizen: Wirkungsquerschnitte für Gleichverteilung der 62P3/2-Zustände von Cäsium durch Stöße mit gesättigten Kohlenwasserstoffen

1969 ◽  
Vol 24 (6) ◽  
pp. 1030-1031
Author(s):  
N . Fronimos ◽  
J. Fricke ◽  
J. Haas
Keyword(s):  
Angular Momentum ◽  
Cross Sections ◽  
Selection Rule ◽  
Optical Pumping

Additional cross sections for collisionally induced mixing of the Cs-62P3/2 sublevels have been measured from optical pumping with σ+ D2-light. Using the model of a random re­orientation of the electronic angular momentum during the collision the derived cross sections are: Cs-CH4 (206±40) Å2, Cs-C2H6 (303±60) Å2, Cs-C3H8 (370 ±70) Å2. The existence of a selection rule mJ ﹘ /→ ﹘mJ would in­crease these values by a factor of 1.5.

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