Levels of Gd-159 populated in average resonance neutron capture

摘要

The primary gamma-rays and energy levels in Gd-159 were investigated in average resonance neutron capture using tailored neutron beams at 2 keV and 24 keV and a pair spectrometer at the high flux reactor at Brookhaven. Nearly 200 levels with spin up to (5)/(2) are reported below 3 MeV The distribution of radiative strength in this nucleus was obtained and is compared with a giant dipole resonance and single-particle strength models. The density of observed levels was determined and is described in terms of the constant temperature Fermi gas model. The neutron binding energy in Gd-159 was determined to be 5943.32(12) keV. (C) 2003 Elsevier B. V. All rights reserved. [References: 34]