scholarly journals Sub-Coulomb Stripping in the 124Sn(d,p)125Sn Reaction

1971 ◽  
Vol 24 (4) ◽  
pp. 793 ◽  
Author(s):  
DL Powell ◽  
PJ Dallimore ◽  
WF Davidson
Keyword(s):  
Optical Model ◽  
Angular Distributions ◽  
Model Parameters ◽  
Spectroscopic Factors

Angular distributions for the reaction 124Sn(d, p)125Sn leading to the unresolved ground and O� 026 MeV levels and to the 0'210, O� 936, 1 -257, 1� 362, and 1 . 540 MeV levels of 125Sn have been measured with deuteron energies of 5� 1 and 12-0MeV. Spectroscopic factors have been extracted using the DWBA theory. The dependence of the calculations on various assumptions of the theory has been studied by comparing the results at both energies. The sub-Coulomb data have been found to yield more reliable spectroscopic factors because of the lack of sensitivity to the optical model parameters used in the distorting potentials.

Study of the 48Ti(α,p)51V and 50Ti(3He,d)51V Reactions

1971 ◽  
Vol 49 (8) ◽  
pp. 1053-1065 ◽  
Author(s):  
P. N. Maheshwari ◽  
U. C. Gupta ◽  
C. St-Pierre
Keyword(s):  
Optical Model ◽  
Energy Levels ◽  
Angular Distributions ◽  
Model Parameters ◽  
Model Calculations ◽  
Angular Momenta ◽  
Rotator Model ◽  
Spectroscopic Factors ◽  
New Energy ◽  
Bombarding Energy

The reactions 48Ti(α,p)51V at ten bombarding energies between 8.25 and 10.75 MeV and 50Ti(3He,d)51V at 10 MeV bombarding energy have been studied. Energy levels of 51V up to 4.85 and 6.17 MeV have been observed by (α,p) and (3He,d) reactions respectively. The (α,p) reaction yielded many new energy levels. The angular distributions for deuterons were measured at lab angles between 15° and 120°, and compared with predictions of DWBA calculations using the TSALLY code from which the transferred angular momenta and spectroscopic factors were deduced. These experimental results are examined from the viewpoint of shell model and strong coupling rotator model calculations. The effect of changing various optical model parameters is also discussed.

Detailed study for 16O → 12C + α and 12C → 11B + p spectroscopic factors

2014 ◽  
Vol 23 (10) ◽  
pp. 1450061 ◽  
Author(s):  
Sh. Hamada ◽  
N. Burtebayev ◽  
N. Amangeldi
Keyword(s):  
Elastic Scattering ◽  
Excitation Function ◽  
Optical Model ◽  
Transfer Reaction ◽  
Spectroscopic Factor ◽  
Ion Beam ◽  
Angular Distributions ◽  
Model Potentials ◽  
Spectroscopic Factors ◽  
Double Folding

We have measured the angular distributions for 16 O elastically scattered on 12 C nuclei at energy 28 MeV and also for 12 C ion beam elastically scattered on 11 B target nuclei at energy 18 MeV. These measurements were performed in the cyclotron DC-60 INP NNC RK. Calculations were performed using both empirical Woods–Saxon and double folding optical model potentials. Both elastic scattering and transfer reaction were taken into consideration. We have extracted the spectroscopic factors for the configurations 16 O → 12 C + α and 12 C → 11 B + p and compared them with other calculated or extracted values at different energies from literature. The extracted spectroscopic factor for the configuration 12 C → 11 B + p from the current work is in the range 2.7–3.1, which is very close to Cohen–Kurath prediction. While for the configuration 16 O → 12 C + α, spectroscopic factors show fluctuation with energy which could be due to the well-known resonant-like behavior observed in 16 O + 12 C excitation function.

scholarly journals Differential Cross Sections for the 13C(3He, p0) and 15N(3He, p0) Reactions at 15 MeV

1975 ◽  
Vol 28 (3) ◽  
pp. 247 ◽  
Author(s):  
J Havloujian ◽  
G Ravalli ◽  
BM Spice
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Optical Model ◽  
Residual Nucleus ◽  
Angular Distributions ◽  
Model Parameters ◽  
Differential Cross Sections ◽  
Channel Parameters ◽  
Free Parameters ◽  
Bombarding Energy

The angular distributions of the ground state proton groups from 3He-induced reactions with 13C and BN targets have been measured at a bombarding energy of 15 MeV. The DWBA program DWUCK has been used to fit the differential cross sections with no free parameters. The optical model parameters for the proton-residual nucleus channel were taken from the literature, and the 3He-target nucleus channel parameters were obtained by fitting the 3He elastic scattering differential cross sections.

Vector analyzing powers for the reaction to a transitional nucleus 147Nd

1977 ◽  
Vol 55 (19) ◽  
pp. 1697-1703 ◽  
Author(s):  
O. Straume ◽  
G. Løvhøiden ◽  
D. G. Burke ◽  
J. C. Waddington
Keyword(s):  
Cross Section ◽  
Proportional Counter ◽  
Focal Plane ◽  
Optical Model ◽  
Mass Region ◽  
Angular Distributions ◽  
Model Parameters ◽  
Analyzing Powers ◽  
Dwba Calculation ◽  
Position Sensitive

The [Formula: see text] reaction has been studied using 17 MeV deuterons with a vector polarization of ~0.75 from the McMaster University tandem Van de Graaff accelerator. Measurements were made at 18 angles from 6° to 57.5° using a magnetic spectrograph equipped with a position-sensitive proportional counter in the focal plane. It was found that the [Formula: see text] reaction is a very powerful technique for spin determinations in this mass region as the vector analyzing powers have quite large magnitudes. A DWBA calculation with optical model parameters previously optimized to fit cross-section angular distributions was also successful in predicting the analyzing powers for states of known spin and parity. The measured analyzing powers made it possible to give unambiguous spin assignments for over 15 states for which spin information was previously conflicting, incomplete, or lacking.

The 44Ca(d,α)42K Reaction at 4.0 MeV

1974 ◽  
Vol 52 (9) ◽  
pp. 772-778 ◽  
Author(s):  
S. T. Lee ◽  
D. D. Long
Keyword(s):  
Excitation Function ◽  
Born Approximation ◽  
Optical Model ◽  
Angular Distributions ◽  
Model Parameters ◽  
Direct Reaction ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation

The angular distributions from the 44Ca(d,α)42K reaction were measured at Ed = 4.0 MeV in a range of angles from 40° to 160°. Based on the observation of forward peaking of the angular distributions and diminished fluctuations at 4 MeV in the excitation function, an analysis was carried out utilizing the distorted wave Born approximation. For the five strongly excited levels below 1.3 MeV, satisfactory fits were obtained using optical model parameters from the literature. The results, which were consistent with the spin assignments from other experiments, revealed no gross inadequacies of a direct reaction analysis at this energy which are not present at higher energies. For three levels in42K, the range of spins was tentatively reduced. In the case of the 1.113 MeV level, no previous assignments had been made.

scholarly journals The 11B(3He,n0)13N Reaction

1977 ◽  
Vol 30 (2) ◽  
pp. 167 ◽  
Author(s):  
JR Davis ◽  
GU Din
Keyword(s):  
Elastic Scattering ◽  
Excitation Function ◽  
Cross Sections ◽  
Optical Model ◽  
Angular Distributions ◽  
Model Parameters ◽  
Direct Reaction ◽  
Reaction Component

The excitation function from 5�0 to 11� 5 MeV and angular distributions at 5� 2, 6� 5, 8� 0, 9�0, 10'0,11�0 and 12�0 MeV have been obtained for the "B(3He,no)13N reaction. "The data were analysed using an incoherent sum of Hauser-Feshbach and DWBA cross sections. Optical model parameters derived from elastic scattering experiments describe the direct reaction component reasonably well.

Use of Al analyzing power

1979 ◽  
Vol 57 (4) ◽  
pp. 505-507 ◽  
Author(s):  
M. A. M. Shahabuddin ◽  
L. Buja-Bijunas ◽  
W. R. Stott ◽  
J. C. Waddington
Keyword(s):  
Cross Section ◽  
Optical Model ◽  
Angular Distributions ◽  
Model Parameters ◽  
Analyzing Power

The [Formula: see text] Al cross section and analyzing power angular distributions were measured at Ep = 17.0 MeV. The fits to the cluster DWBA calculations have shown that the analyzing power can play an important role in the determination of the correct optical model parameters.

4He+Ni elastic scattering near the Coulomb barrier and optical model parameters

2002 ◽  
Vol 91 (4) ◽  
pp. 2438-2442 ◽  
Author(s):  
A. Nurmela ◽  
P. Pusa ◽  
E. Rauhala ◽  
J. Räisänen
Keyword(s):  
Elastic Scattering ◽  
Coulomb Barrier ◽  
Optical Model ◽  
Model Parameters
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