The 139La(n,gamma) cross section: key for the onset of the s process

Details The 139La(n,gamma) cross section: key for the onset of the s process The 139La(n,gamma) cross section: key for the onset of the s process

2006-10-24

arxiv.org/abs/nucl-ex/0610034v1

Phys.Rev.C75:035807,2007

Physics

Nuclear Physics

Nuclear Experiment

50 pages and 9 Figures

Scientific paper

10.1103/PhysRevC.75.035807

The nuclear resonance parameters and the capture cross section of the neutron magic isotope 139La has been measured n_TOF. The description of the experimental apparata is followed by the data analysis procedures. We extracted the resonance parameters, the main nuclear quantities such as the resonance integral, the average gamma widths for s- and p-waves, the nuclear level densities and the neutron strength functions. These results represent a signifcant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low metallicity stars.

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