Capture cross sections on unstable nuclei

A.P. Tonchev, J.E. Escher, N. Scielzo, P. Bedrossian, R.S. Ilieva, P. Humby, N. Cooper, P.M. Goddard, V. Werner, W. Tornow, G. Rusev, J.H. Kelley, N. Pietralla, M. Scheck, D. Savran, B. Löher, S.W. Yates, B. P. Crider, E. E. Peters, N TsonevaS. Goriely

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Abstract

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.
Original languageEnglish
Article number01013
Number of pages5
JournalEPJ Web Conf.
Volume146
DOIs
Publication statusE-pub ahead of print - 13 Sep 2017

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    Tonchev, A. P., Escher, J. E., Scielzo, N., Bedrossian, P., Ilieva, R. S., Humby, P., Cooper, N., Goddard, P. M., Werner, V., Tornow, W., Rusev, G., Kelley, J. H., Pietralla, N., Scheck, M., Savran, D., Löher, B., Yates, S. W., Crider, B. P., Peters, E. E., ... Goriely, S. (2017). Capture cross sections on unstable nuclei. EPJ Web Conf., 146, [01013]. https://doi.org/10.1051/epjconf/201714601013