2017 journal article

Capture cross sections on unstable nuclei

EPJ Web of Conferences, 146, 01013.

By: A. Tonchev*, J. Escher*, N. Scielzo*, P. Bedrossian*, R. Ilieva*, P. Humby*, N. Cooper*, P. Goddard* ...

Ed(s): A. Plompen, F. Hambsch, P. Schillebeeckx, W. Mondelaers, J. Heyse, S. Kopecky, P. Siegler, S. Oberstedt

Source: Crossref
Added: February 24, 2020

Accurate neutron-capture cross sections on unstable nuclei near the line of beta stability are crucial for understanding the s -process nucleosynthesis. However, neutron-capture cross sections for short-lived radionuclides are difficult to measure due to the fact that the measurements require both highly radioactive samples and intense neutron sources. Essential ingredients for describing the γ decays following neutron capture are the γ-ray strength function and level densities. We will compare different indirect approaches for obtaining the most relevant observables that can constrain Hauser-Feshbach statistical-model calculations of capture cross sections. Specifically, we will consider photon scattering using monoenergetic and 100% linearly polarized photon beams. Challenges that exist on the path to obtaining neutron-capture cross sections for reactions on isotopes near and far from stability will be discussed.