Stellar neutron spectra at 28 keV thermal temperature

To calculate the reaction rate in neutron capture processes it is common to work with Maxwellian Average Cross Section (MACS), defined as scaled by most probable velocity of Maxwell-Boltzmann distribution. For MACS determination lower uncertainties, need a spectrum similar possible stellar one motivates this work. At CN Van der Graaff accelerator LNLINFN laboratories, an experimental measurement performed produce 28 keV thermal temperature. The time-of-flight spectrometry implemented determine 0°-90° integrated spectrum, employing 7 Li(p,n) Be source, initial proton energy 3.17 MeV and 51 µm thickness aluminum foil, shaper.