| Autor: |
Y. Waschitz, D. Amanbayev, A. Spătaru, I. Mardor, T. Dickel, E. O. Cohen, O. Aviv, S. Ayet San Andrés, D. L. Balabanski, S. Beck, J. Bergmann, Z. Brencic, P. Constantin, M. Dehghan, H. Geissel, L. Gröf, C. Hornung, N. Kalantar-Nayestanaki, G. Kripko-Koncz, I. Miskun, A. Mollaebrahimi, D. Nichita, W. R. Plaß, S. Pomp, C. Scheidenberger, A. Solders, G. Stanic, M. Wasserheß, M. Vencelj, J. Zhao |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
EPJ Web of Conferences. 284:04005 |
| ISSN: |
2100-014X |
| DOI: |
10.1051/epjconf/202328404005 |
| Popis: |
We present first preliminary results of a novel method for measuring independent isotopic fission yields (IIFYs) of spontaneous fission (SF) via direct mass measurements, at the FRS Ion Catcher (FRS-IC) at GSI. Fission products were generated from a 252Cf source installed in a cryogenic stopping cell, and were identified and counted with the multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) of the FRS-IC, utilizing well-established measurement and data analysis methods. The MR-TOF-MS resolves isobars unambiguously, even with limited statistics, and its non-scanning nature ensures minimal relative systematic uncertainties amongst fission products. The analysis for extracting IIFYs includes isotope-dependent efficiency corrections for all components of the FRS-IC. In particular, we applied a self-consistent technique that takes into account the element-dependent survival efficiencies in the CSC, due to chemical reactions with the buffer gas. Our IIFY results, which cover several tens of fission products in the less-accessible high-mass peak (Z = 56 to 63) down to fission yields at the level of 10−5, are generally similar to those of the nuclear database ENDF/B-VII.0. Nevertheless, they reveal some structures that are not observed in the database smooth trends. These are the first results of a planned campaign to investigate IIFY distributions of spontaneous fission at the FRS-IC. Upcoming experiments will extend our results to wider Z and N ranges, lower fission yields, and other spontaneously-fissioning actinides. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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