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Independent isotopic fission yields of Cf-252 spontaneous fission via mass measurements at the FRS Ion Catcher
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- Waschitz, Y. (författare)
- Israel Atom Energy Commiss Tel Aviv, POB 7061, IL-61070 Tel Aviv, Israel.
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- Amanbayev, D. (författare)
- Justus Liebig Univ Giessen, II Phys Inst, D-35392 Giessen, Germany.
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- Spataru, A. (författare)
- Horia Hulubei Natl Inst R&D Phys & Nucl Engn, Extreme Light Infrastruct Nucl Phys ELI NP, Str Reactorului 30, Bucharest 077125, Romania.;Univ Polytech Bucharest, Doctoral Sch Engn & Applicat Lasers & Accelerator, Bucharest 060811, Romania.
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- Aviv, O. (författare)
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- Israel Atom Energy Commiss Tel Aviv, POB 7061, IL-61070 Tel Aviv, Israel Justus Liebig Univ Giessen, II Phys Inst, D-35392 Giessen, Germany. (creator_code:org_t)
- EDP Sciences, 2023
- 2023
- Engelska.
- Ingår i: 15th International Conference on Nuclear Data for Science and Technology, ND2022. - : EDP Sciences.
- Konferensbidrag (refereegranskat)
Abstract
Ämnesord
Stäng
- 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 Cf-252 source installed in a cryogenic stopping cell, and were identified and counted with the multiple-reflection time-of-flight mass spectrometer (MR-TOR-MS) of the FRS-IC, utilizing well-established measurement and data analysis methods. The MR-TOR-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.O. 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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