scholarly journals η-nuclear interaction: Optical model versus coupled-channels approach

2015 ◽  
Vol 92 (5) ◽  
Author(s):  
J. A. Niskanen
Keyword(s):  
Optical Model ◽  
Nuclear Interaction ◽  
Coupled Channels ◽  
Model Versus

scholarly journals The refractive scattering of 17F+12C

2020 ◽  
Vol 239 ◽  
pp. 03010
Author(s):  
Liyuan Hu ◽  
Yushou Song ◽  
Yingwei Hou ◽  
Huilan Liu
Keyword(s):  
Experimental Data ◽  
Angular Distribution ◽  
Elastic Scattering ◽  
Optical Potential ◽  
Optical Model ◽  
Channel Calculation ◽  
Coupled Channels ◽  
The One ◽  
Nuclear Rainbow ◽  
The Continuum

The experimental data of the elastic scattering angular distribution of 17F+12C at 170 MeV is analyzed by the continuum-discretized coupled channels (CDCC) method and the optical model (OM). In the CDCC calculation, the unambiguous optical potential of 16O+12C is used as the input to give the coupling potentials. A very refractive feature is found and two evident Airy minima are predicted at large angles. The one-channel calculation is also performed and gives nearly the same result. In the OM calculations, this optical potential of 16O+12C is used again and adjusted to reproduce the angular distribution of 17F+12C. The Airy oscillation appears again in the calculated angular distribution. These results indicate that the elastic scattering of 17F+12C at 170 MeV has the possibility of the nuclear rainbow phenomenon, which is probably due to the contribution from the 16O core.

s- andp-wave neutrons onSi30andS34: Coupled channels optical model

1984 ◽  
Vol 29 (6) ◽  
pp. 1993-1995 ◽  
Author(s):  
Alan D. MacKellar ◽  
Boris Castel
Keyword(s):  
Optical Model ◽  
Coupled Channels

scholarly journals Coupled-channels Optical Model Analyses of Nucleon-induced Reactions for Medium and Heavy Nuclei in the Energy Region from 1 keV to 200 MeV

2007 ◽  
Vol 44 (6) ◽  
pp. 838-852 ◽  
Author(s):  
Satoshi KUNIEDA ◽  
Satoshi CHIBA ◽  
Keiichi SHIBATA ◽  
Akira ICHIHARA ◽  
Efrem Sh. SUKHOVITSKĨ
Keyword(s):  
Energy Region ◽  
Optical Model ◽  
Heavy Nuclei ◽  
Coupled Channels

Dispersive optical-model and coupled-channels descriptions of neutron scattering fromAl27andCo59up to80MeV

2003 ◽  
Vol 68 (4) ◽  
Author(s):  
M. M. Nagadi ◽  
C. R. Howell ◽  
W. Tornow ◽  
G. J. Weisel ◽  
M. A. Al-Ohali ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Optical Model ◽  
Coupled Channels

Optical model and coupled-channels analysis ofLi7+Si28andLi7+Ca40scattering

1982 ◽  
Vol 25 (5) ◽  
pp. 2391-2397 ◽  
Author(s):  
John S. Eck ◽  
T. R. Ophel ◽  
P. D. Clark ◽  
J. Nurzynski ◽  
D. C. Weisser
Keyword(s):  
Optical Model ◽  
Coupled Channels

Coupled-channels optical model calculations with account of nuclear volume conservation

1999 ◽  
Vol 646 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Efrem Sh. Sukhovitskiĩ ◽  
Satoshi Chiba ◽  
Osamu Iwamoto
Keyword(s):  
Optical Model ◽  
Nuclear Volume ◽  
Volume Conservation ◽  
Model Calculations ◽  
Coupled Channels

scholarly journals Cross-sections at sub-Coulomb energies: Full optical model versus barrier transmission for 40Ca + α

2019 ◽  
Vol 28 (05) ◽  
pp. 1950029 ◽  
Author(s):  
Peter Mohr
Keyword(s):  
Cross Sections ◽  
Optical Model ◽  
Transmission Model ◽  
Nuclear Potential ◽  
Additional Absorption ◽  
Excitation Functions ◽  
Folding Potential ◽  
Low Energies ◽  
Model Versus ◽  
Double Folding

Cross-sections for [Formula: see text]Ca + [Formula: see text] at low energies have been calculated from two different models and three different [Formula: see text]-nucleus potentials. The first model determines the cross-sections from the barrier transmission in a real nuclear potential. Second, cross-sections are derived within the optical model (OM) using a complex nuclear potential. The excitation functions from barrier transmission are smooth, whereas the excitation functions from the OM show a significant sensitivity to the chosen imaginary potential. Cross-sections far below the Coulomb barrier are lower from barrier transmission than from the OM. This difference is explained by additional absorption in the tail of the imaginary part of the potential in the OM. At higher energies, the calculations from the two models and all [Formula: see text]-nucleus potentials converge. Finally, in contradiction to another recent study where a double-folding potential failed in a WKB calculation, the applicability of double-folding potentials for [Formula: see text]Ca + [Formula: see text] at low energies is clearly confirmed in the present analysis for the simple barrier transmission model and for the full OM calculation.

scholarly journals Dispersive coupled-channels optical-model potential with soft-rotator couplings for Cr, Fe, and Ni isotopes

2013 ◽  
Vol 87 (5) ◽  
Author(s):  
Rui Li ◽  
Weili Sun ◽  
E. Sh. Soukhovitskiĩ ◽  
J. M. Quesada ◽  
R. Capote
Keyword(s):  
Optical Model ◽  
Model Potential ◽  
Coupled Channels ◽  
Optical Model Potential

scholarly journals Reactions with Exotic Nuclei at Near and Sub-barrier Energies

2019 ◽  
Vol 223 ◽  
pp. 01071
Author(s):  
Lei Yang ◽  
Chengjian Lin ◽  
Huiming Jia ◽  
Nanru Ma ◽  
Dongxi Wang ◽  
...  
Keyword(s):  
Coulomb Barrier ◽  
Reaction Mechanisms ◽  
Optical Model ◽  
Threshold Energy ◽  
Neutron Halo ◽  
Nuclear System ◽  
Reaction Products ◽  
Model Potentials ◽  
Coupled Channels ◽  
Proton Transfer Reactions

We will introduce some new results derived recently by the nuclear reaction group at China Institute of Atomic Energy, on the properties of the optical model potentials of neutron-halo 6He system and reaction mechanisms induced by proton-drip line nucleus 17F at energies around the Coulomb barrier. For the study of optical model potentials of exotic nuclear system, we proposed a novel method, i.e., the transfer reaction method. This method has been applied to extract the optical potentials of neutron-halo 6He+209Bi system by measuring the one-proton transfer reactions induced by 7Li on a 208Pb target. A complete picture of threshold anomaly behavior was obtained in the 6He+209Bi system for the first time, where a decreasing trend of the depth of the imaginary potential is observed in the deep sub-barrier region, and the reaction threshold energy is extracted. Moreover, results show thatthe dispersion relation is not applicable for this exotic nuclear system. Reaction mechanisms of proton-rich nuclear systems 17F+89Y and 58Ni were also studied at energies around the Coulomb barrier. Continuum discretized coupled-channels calculations indicate that the coupling effects of the continuum states of 17F+89Y is not significant. Thanks to the employment of a powerful ionization-chamber based detector array, the reaction products over a large Z in the systems of 17F+58Ni can be identified clearly. The data analysis is undergoing.

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