Neutron capture cross-sections of stable xenon isotopes and their application in stellar nucleosynthesis

@article{Beer1983NeutronCC,
  title={Neutron capture cross-sections of stable xenon isotopes and their application in stellar nucleosynthesis},
  author={H. Beer and F. Käppeler and G. Reffo and G. Venturini},
  journal={Astrophysics and Space Science},
  year={1983},
  volume={97},
  pages={95-119}
}
The neutron capture cross-sections of124, 132, 134Xe have been measured by the activation technique at 25 keV neutron energy. These data were supplemented by calculated capture cross-sections for128, 129, 130, 131Xe via the statistical model. The complete set of capture cross-sections obtained in this way served to determine the solar xenon abundance throughs-process systematics and to study a variety of isotopic anomalies. 
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References

SHOWING 1-10 OF 34 REFERENCES
Nucleosynthesis and Neutron-Capture Cross Sections
The role of neutron capture reactions in the nucleosynthesis of heavy elements in stars is reviewed. Maxwellian-averaged capture cross sections at 30 keV are presented for most isotopes across theExpand
Fast Neutron Capture Cross Sections and Related Gamma-Ray Spectra of Niobium-93, Rhodium-103, and Tantalum-181
The capture cross sections of /sup 93/-Nb, /sup 103/Rh, and /sup 181/Ta were measured in the 10- to 70-keV neutron energy range, using /sup 197/Au as a standard. Hauser-Feshbach calculations wereExpand
Beta decay rates forS-process studies
The rates for a variety of beta decay processes have been determined as a function of temperature for nuclei which can participate in thes-process production of heavy elements, occurring in theExpand
30 keV (n, γ) cross-sections from the nuclear statistical model
Global input parameters for a Hauser-Feshbach calculation of astrophysical nuclear reaction rates are evaluated; wherever possible they are expressed as systematic functions of nucleon numbersN andZExpand
s-Process Studies In the Light of New Experimental Cross Sections: Distribution of Neutron Fluences and r-Process Residuals
A best set of neutron-capture cross section has been evaluated for the most important s-process isotopes. With this data base, s-process studies have been carried out using the traditional modelExpand
Neutron capture time scale of the s-process, estimated from s-process krypton in a meteorite
A krypton fraction enriched in s-process isotopes was extracted from a mineral fraction of the Murchison C2 chondrite. The (Kr-86)/(Kr-84) ratio is enhanced by 6 standard deviations, showing thatExpand
Neutron capture chains in heavy element synthesis
Abstract This paper is concerned with stellar neutron capture processes which occur at a rate slow compared to the intervening beta decays, the so-called s-process in the synthesis of the elements.Expand
Alternative hypothesis for the origin of CCF xenon
I SUGGEST that the anomalous xenon isotopic composition known as carbonaceous chondrite fission (CCF) xenon is not caused by fission, but is the direct result of a modified r-process nucleosynthesisExpand
s-process studies - Xenon and krypton isotopic abundances
We propose an analysis of the s-process contributions to the isotopes of xenon and krypton. The object is to aid studies of the possibility that meteorites may contain gas that was carried inExpand
Effects of unthermalized isomeric states and of a time-varying neutron flux of s-process branching ratios
A study has been made of branched s-process nucleosynthesis in the convective helium shells that appear in intermediate-mass red giant during thermal pulses. It is shown that, even though the averageExpand
...
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4
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