Gießen 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 66: Structure and Dynamics of Nuclei XIII
HK 66.2: Vortrag
Donnerstag, 14. März 2024, 16:00–16:15, HBR 19: C 5b
Measurement of masses of fission products and isotopic yields from a 252Cf spontaneous fission source at the FRS Ion Catcher — •Meetika Narang for the FRS Ion Catcher collaboration — University of Groningen, Netherlands — GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany.
The knowledge of independent isotopic fission yields (IIFYs) and their masses is crucial for understanding the astrophysical r-process of nucleosynthesis, nuclear structure and reactions, and nuclear reactor safety.
At the FRS Ion Catcher (FRS-IC) at GSI, fission fragments are produced by spontaneous fission (SF) from a 252Cf source mounted inside a Cryogenic Stopping Cell (CSC), thermalized and stopped within the CSC. Their masses and IIFYs are measured using a Multiple-Reflection Time-Of-Flight Mass-Spectrometer (MR-TOF-MS). Incorporating several novel and unique concepts, the MR-TOF-MS resolves isobars, even with limited statistics. Its broadband nature ensures minimal relative systematic uncertainties among fission products. Extracting IIFYs includes isotope-dependent efficiency corrections for all the components of FRS-IC.
In this talk, I will present our results of the high-accuracy mass measurements, as they include the first direct mass measurement at the N=90 and Z=56-62 region, and our IIFYs results, which cover several tens of fission products in the less-accessible high-mass peak down to fission yields at the level of 10−5. Future experiments will extend our results to wider Z and N ranges, lower fission yields, and other spontaneously-fissioning actinides.
Keywords: Spontaneous fission; Isotopic Independent fission Yields; CSC; MR-TOF-MS