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Ge( ) cross section below 70 keV measured at n_TOF CERN.

C Lederer-Woods1, O Aberle2, J Andrzejewski3

  • 1School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK.

The European Physical Journal. A, Hadrons and Nuclei
|December 14, 2022
PubMed
Summary
This summary is machine-generated.

We measured neutron capture cross sections for Germanium-70 (⁷⁰Ge) to understand its production in stars. Our new data aligns with previous experiments after re-normalizing based on updated cross section references.

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Area of Science:

  • Nuclear astrophysics
  • Stellar nucleosynthesis
  • Neutron capture reactions

Background:

  • Germanium-70 (⁷⁰Ge) production is crucial for understanding the slow neutron capture process (s-process) in stars.
  • Accurate neutron capture cross sections are needed for astrophysical models.

Purpose of the Study:

  • To present new resonance data for neutron capture reactions on ⁷⁰Ge below 70 keV.
  • To calculate Maxwellian averaged cross sections for ⁷⁰Ge.

Main Methods:

  • Measurement of neutron capture cross sections on ⁷⁰Ge using resonance data.
  • Calculation of Maxwellian averaged cross sections by combining new data with evaluated cross sections.

Main Results:

  • New resonance data for ⁷⁰Ge(n, γ) reactions below 70 keV neutron energy was obtained.
  • Calculated stellar cross sections for ⁷⁰Ge are in agreement with a previous activation measurement (Marganiec et al.) after re-normalization.

Conclusions:

  • The study provides crucial data for ⁷⁰Ge production during the s-process.
  • The findings validate previous experimental results with updated cross section references.