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    Deriving capture and reaction cross sections from observed quasi-elastic and elastic backscattering
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    Abstract:
    Based on reaction theory, we suggest a useful method for extracting total and partial reaction and capture (complete fusion) cross sections from the experimental elastic and quasi-elastic backscattering excitation functions taken at a single angle. We also propose a method to predict the differential reaction cross section from the observed elastic-scattering angular distribution.
    Keywords:
    Scattering cross-section
    Nuclear cross section
    Excitation function
    Glauber
    Scattering cross-section
    Nuclear cross section
    Momentum (technical analysis)
    Optical theorem
    Formalism (music)
    The rainbow scattering effect in differential elastic and inelastic cross sections of 3He and 4He scattering by atomic nuclei at energies E>or approximately=100 MeV has been studied by making use of a model-free determination of the real part of the nuclear scattering phase. The experimentally observed diffraction oscillation damping in differential elastic and inelastic cross sections is reproduced quite well. A similar effect in the (3He,3H) quasi-elastic charge-exchange reaction cross section is predicted.
    Rainbow
    Scattering cross-section
    Nuclear cross section
    Quasielastic scattering
    Based on reaction theory, we suggest a useful method for extracting total and partial reaction and capture (complete fusion) cross sections from the experimental elastic and quasi-elastic backscattering excitation functions taken at a single angle. We also propose a method to predict the differential reaction cross section from the observed elastic-scattering angular distribution.
    Scattering cross-section
    Nuclear cross section
    Excitation function
    Citations (10)
    A method proposed by Das (1978) has been employed to calculate the elastic differential cross section and the total collisional cross section for the electrons scattered by the hydrogen molecule. The total collisional cross sections and the real part of the forward elastic scattering amplitudes are also obtained for the scattering of electrons by H and He atoms. The theoretical results are compared with the available experimental and other accurate theoretical data. The authors have found that the present results for the differential cross section are in reasonable agreement only at the intermediate angles.
    Scattering cross-section
    Nuclear cross section
    Electron scattering
    Hydrogen molecule
    Abstract The differential cross‐section for the elastic scattering of He 4 particles on Be 9 has been studied in the bombarding energy range 1.4‐2.5 MeV. The excitation functions for the elastically scattered α‐particles from Be 9 were measured at six angles 90°, 125°, 132°, 140°, 150° and 160° in the centre of mass system. A clear and pronounced resonance is observed in the measured cross‐section at incident α‐particle energy 1.93 MeV. Analysis of the data in terms of the single level approximation theory leads to the assignment J π = 5+/2 for the observed resonance. Reduced and partial widths for elastic scattering were determined.
    Scattering cross-section
    Nuclear cross section
    α particles
    Particle (ecology)
    Citations (11)