Underground nuclear astrophysics studies with CASPAR

¹ Department of Physics, University of Notre Dame, Notre Dame, IN, 46556, USA
² Department of Physics, Colorado School of Mines, Golden, CO, 80401, USA
³ Department of Physics, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA

^a e-mail: drobert4@nd.edu

Published online: 12 February 2016

Abstract

The drive of low-energy nuclear astrophysics laboratories is to study the reactions of importance to stellar burning processes and elemental production through stellar nucleosynthesis, over the energy range of astrophysical interest. As laboratory measurements approach the stellar burning window, the rapid drop off of cross-sections is a significant barrier and drives the need to lower background interference. The natural background suppression of underground accelerator facilities enables the extension of current experimental data to lower energies. An example of such reactions of interest are those thought to be sources of neutrons for the s-process, the major production mechanism for elements above the iron peak. The reactions ¹³C(α,n)¹⁶O and ²²Ne(α,n)²⁵Mg are the proposed initial focus of the new nuclear astrophysics accelerator laboratory (CASPAR) currently under construction at the Sanford Underground Research Facility, Lead, South Dakota