The 16O(p, γ)17F Direct Capture Cross Section with an Extrapolation to Astrophysical Energies

1975 ◽  
Vol 53 (17) ◽  
pp. 1672-1686 ◽  
Author(s):  
H. C. Chow ◽  
G. M. Griffiths ◽  
T. H. Hall
Keyword(s):  
Elastic Scattering ◽  
Excited States ◽  
Cross Section ◽  
Cross Sections ◽  
Capture Cross Section ◽  
Scattering Cross Section ◽  
Scattering Data ◽  
Capture Cross ◽  
Scattering Cross ◽  
Elastic Scattering Cross Section

The cross section for the direct radiative capture of protons by 16O has been measured relative to the proton elastic scattering cross section for energies from 800 to 2400 keV (CM). The elastic scattering cross section was normalized to the Rutherford scattering cross section at 385.5 keV. The capture cross section for the reaction 16O(p,γ)17F, which plays a role in hydrogen burning stars, has been extrapolated to stellar energies using a theoretical model which gives a good fit to the measured cross sections. The model involves calculation of electromagnetic matrix elements between initial and final state wave functions evaluated for Saxon–Woods potentials with parameters adjusted to fit both elastic scattering data and binding energies for the ground and first excited states of 17F. Cross sections for capture to the 5/2+ ground and 1/2+ first excited states of 17F in terms of astrophysical S factors valid for energies ≤ 100 keV have been found to be: S5/2+ = (0.317 + 0.0002E) keV b (± 8%); S1/2+ = (8.552 − 0.353E + 0.00013E2) keV b (± 5%).

IWBC ANALYSIS WITH QUASIMOLECULAR OPTICAL POTENTIALS

2005 ◽  
Vol 14 (02) ◽  
pp. 269-278 ◽  
Author(s):  
SOHAIL A. KHAN
Keyword(s):  
Boundary Condition ◽  
Elastic Scattering ◽  
Cross Section ◽  
Cross Sections ◽  
Scattering Cross Section ◽  
Incoming Wave ◽  
Scattering Cross ◽  
Elastic Scattering Cross Section ◽  
Boundary Condition Method ◽  
Wave Boundary

The quasimolecular optical potential with Incoming Wave Boundary Condition model is used to obtain the fusion and elastic scattering cross-section at the sub-Coulomb region and above. This has been done for the 16 O +16 O and 12 C +12 C systems. It is found that sudden potentials describe well the average trend in the fusion and elastic scattering cross-section using the Incoming Wave Boundary Condition Method. Potentials fits for low energy are then used to obtain cross-sections at higher energies. Excellent agreement is obtained for the location of various peaks observed experimentally, especially in the case of 16 O +16 O . The parameters from these potentials give information on the nuclei in these dynamical situations. We find that a larger radius and a low density in the central region is required to explain the phenomena. The range of Yukawa potentials used are also larger by a factor of two as compared to those used by other authors.

scholarly journals New measurement of the elastic scattering cross section of μd muonic atoms off deuterons

1979 ◽  
Vol 85 (4) ◽  
pp. 458-462 ◽  
Author(s):  
A. Bertin ◽  
I. Massa ◽  
M. Piccinini ◽  
A. Vacchi ◽  
G. Vannini ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Cross Section ◽  
Scattering Cross Section ◽  
Muonic Atoms ◽  
Scattering Cross ◽  
Elastic Scattering Cross Section
Sign in / Sign up

Export Citation Format

Share Document