Speaker
Description
The $\alpha$-nuclear potential in exotic nuclei, a key input in modeling the astrophysical p-process [1,2], remains a source of uncertainty due to the lack of experimental data. This potential can be constrained experimentally by measuring the differential cross-section of $\alpha$-scattering near the Coulomb barrier and identifying the best-fit interaction model.
In the context of experiment IS698, we performed the first measurement of $\alpha$-scattering elastic distributions with radioactive isotopes in inverse kinematics. Thin silicon films with high $^4$He amount trapped in the matrix [3] were bombarded with four tin isotopes beams ($^{108}$Sn, $^{109}$Sn, $^{110}$Sn, and $^{112}$Sn) at energies around the Coulomb Barrier. The resulting data were benchmarked against previous direct kinematics measurements of $^{112}$Sn($^4$He, $^4$He)$^{112}$Sn. [4]
In this talk, I will detail the experimental setup, data analysis procedures, and present the first-ever differential cross-section measurements of $\alpha$-scattering involving radioactive tin isotopes, demonstrating the viability and precision of this new method.
[1] A. Simon, et al. J. Phys. G 44, 064006 (2017).
[2] W. Rapp, et al. Astrophys. J. 653, 474 (2006).
[3] V. Godinho, et al. ACS Omega 1(6), 1229 (2016).
[4] D. Galaviz, et al. Phys. Rev. 71,065802 (2005).
