Thermal neutron capture cross-section and resonance integral measurements of 139La(n, $ \gamma$ γ )140La and 140Ce(n, $ \gamma$ γ )141Ce using a Am-Be neutron source

Radiative-capture cross sections for the La139(n,γ) reaction using thermal neutrons and structural properties of LaHurst1, Sweet2, Goldblum3 et al. 2019Phys. Rev. C3000View full textAdd to dashboardCite

“…Our result is consistent with the currently adopted value of 9.04(4) b [27] and is largely in agreement with the earlier measurements listed in Table VIII. It is worth emphasizing that our mean value follows the higher-trending mean-reported values from the most recent activation measurements [4,78,79].…”

“…Consequently, neutron-capture cross sections for 139 La provide an important ingredient for nuclear reactor fuelrelated applications including fission-product decay-heat calculations and transmutation studies, as well as the development of improved physics models for calculationbased nuclear forensics tools [2]. Also, the induced γdecay activity from 140 La, produced following neutron capture, and its relatively short half life (T 1/2 ≈ 1.7 d [3]) make it suitable for isotopic monitoring at reactor facilities, following shutdown, for example [4].…”

Covariance analysis on the thermal neutron capture cross sections using an Am-Be neutron source

“…The neutron spectrum has a mixed component including thermal and epithermal neutrons. Details of the neutron source facility and the spectrum are available in our previous publications [16][17][18]. Analytical grade Ga 2 O 3 powder of Alfa Aesar with purity of 99.995% was prepared in small packets.…”

“…[ 16,17,26] where G th is the thermal self-shielding factor, g is the Westcott factor, and σ 0,M is the neutron capture thermal cross section of the monitor foil. The self-shielding factor G th was estimated analytically as in Ref.…”