PRECISE - Produktion von radioaktivem Si-32 in Sternen und stellaren Explosionen

• Antragsteller: Professor Dr. Rene Reifarth, seit 9/2019
• Fachliche Zuordnung: Kern- und Elementarteilchenphysik, Quantenmechanik, Relativitätstheorie, Felder ; Astrophysik und Astronomie
• Förderung: Förderung von 2018 bis 2022
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 414982478

• Erstellungsjahr: 2024

Zusammenfassung der Projektergebnisse

In the original proposal, different milestones were defined. One of the major milestones was the design, purchase, building and testing of the fast extraction system. This system is required to quickly move an activated, but short-lived, isotope from the activation site to a measurement device. This must be absolutely robust, safe and fulfill all radiation safety requirements. With this device, it is then possible to carry-out a multitude of different neutron activation measurements, also e.g. 32Si(n,γ). This milestone has been completely reached and the device is working successfully, which has been demonstrated with different measurements. It is ready to be moved to an upcoming FRANZ facility and can be directly used, whenever FRANZ delivers the required neutron fields. This achieved milestone is a major step forward. The 32Si(n,γ) reaction can now be measured, if FRANZ and the funding are available. As such, this milestone was not achieved, but it is fully prepared. Moreover, other important neutron capture reactions beside 32Si(n,γ) are also foreseen and planned in the near future. In summary, this project was successful with respect to the technical developments and a major milestone was fully reached. Due to the aforementioned cuts and problems, the technique is prepared but it was not able to constrain the 32Si neutron capture reaction within the shortened period. This can be done any time.

Projektbezogene Publikationen (Auswahl)

• Direkte Reaktionen für die Astrophysik. DPG Frühjahrstagung 2019, München, Germany, 3/2019
  Philipp Erbacher
  
• Nuclear experiments with (at least) one unstable reaction partner. Town meeting on establishing a DFG Schwerpunktprogramm on "Stars as probes of cosmic evolution", Heidelberg, Germany, 4/2019
  René Reifarth
  
• Recent experimental progress for measurements of reaction rates involving radioactive nuclei Talk at NPA-IX, Mainz, Germany, 9/2019
  Christoph Langer