Level densities for Ga 69 , 71 nuclei using a particle-evaporation technique
Not Available
Voinov, A. V. (ORCID:0000000159187672)↗
Engineering topics
Voinov, A. V. (ORCID:0000000159187672)
Publications and source records attributed to Voinov, A. V. (ORCID:0000000159187672).
Neutron-upscattering enhancement of the triple-alpha process
Abstract The neutron inelastic scattering of carbon-12, populating the Hoyle state, is a reaction of interest for the triple-alpha process. The inverse process (neutron upscattering) can enhance the Hoyle state’s decay rate to the bound states of 12 C, effectively increasing the overall triple-alpha reaction rate. The cross section of this reaction is impossible to measure experimentally but has been determined here at astrophysically-relevant energies using detailed balance. Using a highly-collimated monoenergetic beam, here we measure neutrons incident on the Texas Active Target Time Projection Chamber (TexAT TPC) filled with CO 2 gas, we measure the 3 α -particles (arising from the decay of the Hoyle state following inelastic scattering) and a cross section is extracted. Here we show the neutron-upscattering enhancement is observed to be much smaller than previously expected. The importance of the neutron-upscattering enhancement may therefore not be significant aside from in very particular astrophysical sites (e.g. neutron star mergers).
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗