Determination of the $^{209}$Bi(n,$γ$)$^{210g}$Bi cross section using the NICE-Detector

Abstract

The capture cross section of 209 Bi(n,γ) 210g Bi was measured at different astrophysically energies including thermal capture cross section (25 meV), resonance integral, and the Maxwellian averaged cross section at a thermal energy of kT = 30 keV. The partial capture cross section (σ g ) was determined using the activation technique and by measuring the 210 Po activity. The newly developed and tested NICE detector setup was used to measure the α-activity of the 210 Po. Using this setup the thermal and resonance integral cross sections were determined to be 16.2 ± 0.97 mb and 89.81 ± 8.0 mb, respectively. And the Maxwellian average cross section was measured to be 2.01 ± 0.38 mb.