$^{237}$Np absolute delayed neutron yield measurements
Abstract
237Np absolute delayed neutron yields have been measured at different incident neutron energies
from 1.5 to 16MeV. The experiment was performed at the Physikalisch-Technische Bundesanstalt (PTB)
facility where the Van de Graaff accelerator and the cyclotron CV28 delivered 9 different neutron energy
beams using p+T, d+D and d+T reactions. The detection system is made up of twelve 3He tubes inserted
into a polyethylene cylinder. In this paper, the experimental setup and the data analysis method are described.
The evolution of the absolute DN yields as a function of the neutron incident beam energies are presented and
compared to experimental data found in the literature and data from the libraries.