Coulomb breakup of $^6\rm{Li}$ into $α\,+\,\rm{d}$ in the field of ion $^{208}\rm{Pb}$

Details Coulomb breakup of $^6\rm{Li}$ into $α\,+\,\rm{d}$ in the field of ion $^{208}\rm{Pb}$ Coulomb breakup of $^6\rm{Li}$ into $α\,+\,\rm{d}$ in the field of ion $^{208}\rm{Pb}$

2011-05-25

arxiv.org/abs/1105.4942v3

Phys.Rev C.84,065809 (2011)

Physics

Nuclear Physics

Nuclear Theory

11 pages, 5 figures (one figure removed), added the results of new calculations and performed the audit of the text

Scientific paper

10.1103/PhysRevC.84.065809

The triple differential cross section of $^{208}\rm{Pb}(^6\rm{Li};\alpha,\rm{d})^{208}\rm{Pb}$ elastic Coulomb breakup is calculated using the semiclassical method. We fit the parameters of the Woods-Saxon potential using the experimental $\alpha-\rm{d}$ phase shifts for different states to describe the relative motion of $\alpha$-particle and deuteron. In order to check the validity of the two particle approach for $\alpha-d$ system we apply a potential model to describe the $^2\rm{H}(\alpha,\gamma)^6\rm{Li}$ radiative capture. Our results for the Coulomb breakup of $^6\rm{Li}$ show large value of the forward-backward asymmetry of the $\alpha$-particle and deuteron emission around zero energy in the $^6\rm{Li}$ center-of-mass (c.m.) system. Comparison of the results of our calculation with experimental data gives evidence for the dominance of the Coulomb dissociation mechanism at the $\alpha-d$ relative energy larger than $E_{\alpha\,d}>300\,\rm{keV}$ and sufficiently big contribution of nuclear distortion at $E_{\alpha\,d}$ near zero energy, but essentially smaller than the value reported in Ref.[F. Hammache et al. Phys.Rev. C82, 065802 (2010)].

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