Abstract
Prompt thermal neutron-capture partial -ray production cross sections were measured for the first time for the reaction using a cold guided-neutron beam at the Budapest Research Reactor. Absolute -ray cross sections were internally standardized using well-known comparator -ray cross sections belonging to the other tungsten isotopes present in the 11.35% enriched sample. Transitions were assigned to levels in based largely upon information available in the literature. The total radiative thermal neutron-capture cross section was determined from the sum of direct prompt -ray cross sections populating the ground state and a modeled contribution accounting for ground-state feeding from the quasicontinuum. In this work, we find b. A new measurement of the cross section for the metastable isomer at 365.6 keV, b, is also determined. Additionally, primary rays, observed for the first time in the reaction, provide the most precise determination for the neutron-separation energy, keV.
- Received 6 August 2015
- Revised 28 August 2015
DOI:https://doi.org/10.1103/PhysRevC.92.034615
©2015 American Physical Society