Low-energy $^3$He$α$,$α$$^3$He elastic scattering and the $^3$He$α$,$γ$$^7$Be reaction - Nuclear TheoryReportar como inadecuado




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Abstract: The cross sections of the $^3$He$\alpha$,$\alpha$$^3$He and$^3$He$\alpha$,$\gamma$$^7$Be reactions are studied at low energies using asimple two-body model in combination with a double-folding potential. At verylow energies the capture cross section is dominated by direct s-wave capture.However, at energies of several MeV the d-wave contribution increases, and thetheoretical capture cross section depends sensitively on the strength of theL=2 potential. Whereas the description of the L=2 elastic phase shift requiresa relatively weak potential strength, recently measured capture data can onlybe described with a significantly enhanced L=2 potential. A simultaneousdescription of the new experimental capture data and the elastic phase shiftsis not possible within this model. Because of the dominating extranuclearcapture, this conclusion holds in general for most theoretical models.



Autor: P. Mohr

Fuente: https://arxiv.org/



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