In astrophysics, the determination of the optical a-nucleus potential for low a-particle energies, crucial in understanding the origin of the stable isotopes, has turned out to be a challenge. Theory still cannot predict the optical potentials required for the calculation of the astrophysical reaction rates in the Hauser-Feshbach statistical model and there is scant experimental information on reactions with α particles at the relevant astrophysical energies. Measurements of (n, a) crosssections offer a good opportunity to study the α channel. At the n-TOF experiment at CERN, a prototype detector, based on the chemical vapor deposition (CVD) diamond technology, has been recently developed for (n, α) measurements. A reference measurement of the 10B(n, α)7Li reaction was performed in 2011 at n-TOF as a feasibility study for this detector type. The results of this measurement and an outline for future experiments are presented here.
|Journal||Proceedings of Science|
|Publication status||Published - 2011|
|Event||6th European Summer School on Experimental Nuclear Astrophysics, ENAS 2011 - Acireale, Italy|
Duration: 18 Sept 2011 → 27 Sept 2011