scholarly journals Analysis of Angular Distributions of Heavy-ion Inelastic Collisions

1982 ◽  
Vol 35 (1) ◽  
pp. 1
Author(s):  
CBO Mohr
Keyword(s):  
Angular Distribution ◽  
Coulomb Interaction ◽  
Heavy Ions ◽  
Coulomb Excitation ◽  
Heavy Ion ◽  
Inelastic Collisions ◽  
Effective Range ◽  
Transfer Reactions ◽  
Angular Distributions ◽  
Nuclear Excitation

The relative contributions of nuclear and Coulomb excitation to inelastic collisions of heavy ions are examined, and it is shown how to distinguish their effects on the angular distribution. From the experimental distributions for Coulomb excitation it is possible to make an estimate of the effective range of the Coulomb interaction in the collision. The distributions for nuclear excitation are analysed in the same way as in our previous work on transfer reactions, and give very similar results for the greater nuclear penetration in such collisions as compared with elastic collisions.

scholarly journals Analysis of Angular Distributions of Heavy-ion Transfer Reactions

1980 ◽  
Vol 33 (6) ◽  
pp. 965
Author(s):  
CBO Mohr
Keyword(s):  
Elastic Scattering ◽  
Heavy Ions ◽  
Heavy Ion ◽  
Critical Value ◽  
Transfer Reactions ◽  
Angular Distributions ◽  
Ion Transfer ◽  
S Matrix ◽  
Low Energies ◽  
Nuclear Phases

Proceeding as in our earlier analysis of elastic scattering, but with a form for the S matrix appropriate for transfer, peaked at the critical value Ie and with width parameter .d, it is shown how to analyse the angular distribution of transfer reactions of heavy ions to obtain.d. The effect of the nuclear phases is found not to be of such fundamental importance as in elastic scattering. Analysis of theexperimental data reveals an increase of.d with nuclear size especially at low energies, but an increase of nuclear penetration for transfer collisions of the lightest nuclei. The circumstances in which strong coupling might occur between elastic scattering and transfer are examined.

scholarly journals Simplified DWBA for Heavy Ion Induced Transfer at High Energies

1979 ◽  
Vol 32 (3) ◽  
pp. 173 ◽  
Author(s):  
LR Dodd
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Ground State ◽  
Optical Model ◽  
Heavy Ion ◽  
Transfer Reactions ◽  
Angular Distributions ◽  
High Energies ◽  
Scattering States ◽  
Exact Calculations

The treatment of the distorted wave Born approximation (DWBA) for transfer reactions at high energies between complex nuclei due to Braun-Munzinger and Harney (1974) is simplified by introducing eikonal-like representations for the elastic scattering states. Simple expressions for the differential cross sections are derived. The model includes recoil approximately and takes into account the strong absorption of the nuclear cores. Reasonable values for the parameters of the model wavefunctions are determined by comparison with the usual optical model wavefunctions. Angular distributions calculated for the model are compared with the results of exact finite-range DWBA calculations and experimental data for transitions to the ground state and excited states of 13C in the reaction 12C(14N,13N)13C at several energies. The model reproduces the general features of the exact calculations, giving reasonable fits for the transitions to the ground state and the 1ds/2 (3�85 MeV) state. The transition to the 2S1/2 (3 �09 MeV) state appears to be anomalous as in the case of the full DWBA theory.

Coulomb excitation of 133Cs with protons

1985 ◽  
Vol 63 (4) ◽  
pp. 483-487 ◽  
Author(s):  
K. P. Singh ◽  
D. C. Tayal ◽  
B. K. Arora ◽  
T. S. Cheema ◽  
H. S. Hans
Keyword(s):  
Angular Distribution ◽  
Gamma Ray ◽  
Transition Probabilities ◽  
Coulomb Excitation ◽  
Spin Assignment ◽  
Thick Target ◽  
Angular Distributions ◽  
Distribution Data ◽  
Mixing Ratios ◽  
Reduced Transition Probabilities

Protons of energy 3.2–4.2 MeV have been used to Coulomb excite the states in 133Cs. The thick-target gamma-ray yields and the angular distributions were measured using a 50 cm3 Ge(Li) detector. The measurements were used to extract the reduced transition probabilities, B (E2) and B(M1), and multipole mixing ratios (δ) for the various transitions. A spin assignment has been made to the 871.8 keV level on the basis of angular distribution data. The results obtained have been compared with those of other authors.

Angular distribution analysis for quasi-elastic transfer reactions induced in209Bi targets with heavy ions

1979 ◽  
Vol 289 (2) ◽  
pp. 173-181 ◽  
Author(s):  
Y. Llabador ◽  
F. Hubert ◽  
A. Fleury ◽  
D. Gard�s ◽  
M. F. Rivet ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Heavy Ions ◽  
Transfer Reactions ◽  
Distribution Analysis

Investigation of level properties of 139La

1979 ◽  
Vol 57 (11) ◽  
pp. 1940-1948 ◽  
Author(s):  
R. G. Kulkarni ◽  
K. Andhradev
Keyword(s):  
Angular Distribution ◽  
Excited States ◽  
Gamma Ray ◽  
Transition Probabilities ◽  
Coulomb Excitation ◽  
Theoretical Calculations ◽  
Angular Distributions

The excited states of 139La up to 1800 keV were studied by means of Coulomb excitation of 139La with protons varying in energy from 4.0 to 5.5 eV. The gamma-ray yields and angular distributions were measured with a Ge(Li) detector. The levels at 1715.0 and 1767.2 keV were Coulomb excited newly. The results of gamma-ray angular distribution measurements establish spin values of 3/2+, 9/2+, 7/2+, 5/2+, and 3/2+ for the 830, 1219.1, 1536.3, 1715.0, and 1767.2 keV levels, respectively. The reduced E2 and M1 transition probabilities were obtained for 11 transitions. The results were compared with the available theoretical calculations.

scholarly journals Carbon?Carbon Elastic Scattering

1962 ◽  
Vol 15 (1) ◽  
pp. 123 ◽  
Author(s):  
PJ Bunyan
Keyword(s):  
Elastic Scattering ◽  
Heavy Ions ◽  
Optical Model ◽  
Heavy Ion ◽  
Angular Distributions ◽  
Preliminary Study

Optical model analyses of elastic scattering of heavy ions have been carried out by Porter (1958) for nitrogen-nitrogen, and a preliminary study of the carbonnitrogen system has been made by Bassel, Melkanoff, and Drisko (Halbert, Hunting, and Zucker 1960). These analyses have shown that the optical model is capable of predicting, to a higher accuracy than the semiclassical models, the heavy ion elastic angular distributions.

Angular distributions and ranges of heavy products from quasi-elastic transfer reactions induced by heavy ions inBi209

1980 ◽  
Vol 21 (6) ◽  
pp. 2447-2466 ◽  
Author(s):  
D. Gardes ◽  
R. Bimbot ◽  
J. Maison ◽  
M. F. Rivet ◽  
A. Fleury ◽  
...  
Keyword(s):  
Heavy Ions ◽  
Transfer Reactions ◽  
Angular Distributions
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