2020/02/29 by R. Perez Sanchez, B. Jurado, V. Meot +20 · 1 citation
Physics and Astronomy · #nucl-ex
paper · pdf · doi:10.1103/physrevlett.125.122502
published as Phys. Rev. Lett. 125, 122502 (2020) · 8 pages, 3 figures
arxiv created 2020/09/18 · arxiv updated 2020/09/23
Reliable neutron-induced reaction cross sections of unstable nuclei are essential for nuclear astrophysics and applications but their direct measurement is often impossible. The surrogate-reaction method is one of the most promising alternatives to access these cross sections. In this work, we successfully applied the surrogate-reaction method to infer for the first time both the neutron-induced fission and radiative-capture cross sections of 239Pu in a consistent manner from a single measurement. This was achieved by combining simultaneously-measured fission and gamma-emission probabilities for the 240Pu(4He,4He') surrogate reaction with a calculation of the angular-momentum and parity distributions populated in this reaction. While other experiments measure the probabilities for some selected gamma-ray transitions, we measure the gamma-emission probability. This enlarges the applicability of the surrogate-reaction method.