Publication Date:
2016-04-12
Description:
Author(s): A. Wallner, M. Bichler, K. Buczak, I. Dillmann, F. Käppeler, A. Karakas, C. Lederer, M. Lugaro, K. Mair, A. Mengoni, G. Schätzel, P. Steier, and H. P. Trautvetter Many heavy elements in the universe are produced by slow neutron capture (the s process) in stars, and one needs detailed knowledge of both neutron production and capture to understand the physics. This paper reports new measurements of neutron capture on 13 C and 14 N that both lead to 14 C and which act as neutron ”poisons” that starve the s process of neutrons, thus hampering the formation of the heavier elements. The authors use different accelerators, one to perform the capture reaction and one to measure, via accelerator mass spectrometry, the number of produced 14 C nuclei. These data reduce the uncertainty in the predicted stellar neutron densities and the resulting heavy-element yields from the s process. [Phys. Rev. C 93, 045803] Published Mon Apr 11, 2016
Keywords:
Nuclear Astrophysics
Print ISSN:
0556-2813
Electronic ISSN:
1089-490X
Topics:
Physics
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