• DOI:10.1103/PhysRevC.86.015804
• Corpus ID: 5753998

Astrophysical analysis of the measurement of (α,γ) and (α,n) cross sections of 169Tm

@article{Rauscher2012AstrophysicalAO,
  title={Astrophysical analysis of the measurement of ($\alpha$,$\gamma$) and ($\alpha$,n) cross sections of 169Tm},
  author={Thomas Rauscher and G{\'a}bor Gyula Kiss and T. Scucs and Zs. Fulop and Carla Frohlich and Gy. Gyurky and Z. Hal'asz and Zs. Kert'esz and E. Somorjai},
  journal={Physical Review C},
  year={2012},
  volume={86},
  pages={015804}
}

• T. Rauscher, G. Kiss, +6 authors E. Somorjai
• Published 26 June 2012
• Physics
• Physical Review C

energy range 12.6 ≤ E� ≤ 17.5 MeV and 11.5 ≤ E� ≤ 17.5 MeV, respectively, using the recently introduced method of combining activation with X-ray counting. Improved shielding allowed to measure the (�,) to lower energy than previously possible. The combination of (�,) and (�,n) data made it possible to study the energy dependence of thewidth. While absolute value and energy dependence are perfectly reproduced by theory at the energies above 14 MeV, the observed change in energy dependence at energies below 14 MeV requires a modification of the predicted � width. Using an effective, energy-dependent, local optical �+nucleus potential it is possible to reproduce the data but the astrophysical rate is still not well constrained at -process temperatures. The additional uncertainty stemming from a possible modification of the compound formation cross section is discussed. Including the remaining uncertainties, the recommended range of astrophysical reaction rate values at 2 GK is higher than the previously used values by factors of 2 − 37.