New Measurements of Capture γ-rays from ⁵⁵Mn(n,γ)

The accuracy of the data from the de-excitation of ⁵⁶Mn after the neutron capture reaction ⁵⁵Mn(n,γ)⁵⁶Mn needs to be improved. In this talk, I will discuss the results of the measurements of γ-ray transition intensities from ⁵⁶Mn, extracted from the thermal neutron capture reactions on a MnCl₂ sample in recent experiments at the UMass Lowell Research Reactor. The measurements were performed with the four HPGe detectors. The analysis will involve simulation of ⁵⁶Mn capture γ-ray cascades in GEANT4 to evaluate the performance of ENSDF data.