Isomeric fission yield ratios for odd-mass Cd and In isotopes using the phase-imaging ion-cyclotron-resonance technique

Rakopoulos, Vasileios; Lantz, Mattias; Pomp, Stephan; Solders, Andreas; Al-Adili, Ali; Cañete, L.; Eronen, T.; Jokinen, A.; Kankainen, A.; Mattera, A.; Moore, I. D.; Nesterenko, D. A.; Reponen, M.; Rinta‐Antila, S.; Roubin, A. de; Vilén, M.; Österlund, Michael; Penttilä, H.

doi:10.1103/physrevc.99.014617

Cited by 21 publications

(18 citation statements)

References 75 publications

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“…In an earlier work, it has been noticed that TALYS could match the IYR for Cd isotopes only when all the experimentally known levels were included in the calculations. When different combinations for reduced number of levels were tried, the IYR as estimated by TALYS could not come to an agreement with the experimental result [9].…”

Section: Effects Of Level Schemesmentioning

confidence: 86%

“…In another example from ref. [9], the IYR values for Cd could only be matched when all known levels were included.…”

Section: Discussionmentioning

confidence: 99%

“…However, due to the high entrance energy, the reaction is further complicated by a high probability for multi-chance fission and a high entrance angular momentum. In comparison to cold reactions (e.g., spontaneous and thermal neutron induced), rather large values of J rms are extracted from these measurements and sometimes with large fluctuations between different nuclei [7,9]. Therefore, we focus here on the methodology itself and compare it with other calculations.…”

Section: Introductionmentioning

confidence: 99%

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Extraction of angular momenta from isomeric yield ratios

2019

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The generation of angular momentum in fission is difficult to model, in particular at higher excitation energies where data are scarce. Isomeric yield ratios (IYR) play an important role in deducing angular momentum properties of fission fragments (FF), albeit this requires some assumptions and simplifications. To estimate FF angular momentum, fission codes can be used to calculate IYRs and compare them to experimental data. Such measurements have systematically been performed at the IGISOL facility using novel experimental techniques. In conjunction, a new method has been developed to infer the angular momentum of the primary FF using the nuclear reaction code TALYS. In this work, we evaluate this new method by comparing our TALYS calculations with values found in the literature and with results from the GEF fission code, for a few well-studied reactions. The overall results show a consistent performance of TALYS and GEF, as well as of many reported literature values. However, some deviations were found, possibly pinpointing the need to reexamine some of the reported literature values. A sensitivity analysis was also performed, in which the role of excitation energy, neutron emission, discrete level structure and level density models were studied. Finally, the role of multiple chance fission, of relevance for the reactions studied at IGISOL, is discussed. Some literature data for this reaction were also re-analyzed using TALYS, revealing significant differences.

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Section: Effects Of Level Schemesmentioning

confidence: 86%

“…In another example from ref. [9], the IYR values for Cd could only be matched when all known levels were included.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extraction of angular momenta from isomeric yield ratios

2019

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“…1 of Ref. [73]. Hence, even low-lying isomeric states (E x ≤ 100 keV) and their fission yields can be studied.…”

Section: Other Activities At Jyfltrapmentioning

confidence: 99%

“…The results for isomeric yield ratios for 81 Ge, 96,97 Y, 128,130 Sn, and 129 Sb in proton-induced fission on nat U and 232 Th at 25 MeV were reported in [72]. The new PI-ICR technique was recently employed for isomeric fission yield studies of 119−127 Cd and 119−127 In for 25-MeV proton-induced fission on nat U [73]. The benefit in the PI-ICR technique is that it has a superior resolving power as compared to the buffer-gas cooling technique in the first-trap as demonstrated in Fig.…”

Section: Other Activities At Jyfltrapmentioning

confidence: 99%

Recent experiments at the JYFLTRAP Penning trap

et al. 2020

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The JYFLTRAP double Penning trap mass spectrometer at the Ion Guide Isotope Separator On-Line (IGISOL) facility offers excellent possibilities for high-precision mass measurements of radioactive ions. Around 400 atomic masses, including around 50 isomeric states, have been measured since JYFLTRAP became operational. JYFLTRAP has also been used as a high-resolution mass separator for decay spectroscopy experiments as well as an ion counter for fission yield studies. In this contribution, an overview of recent activities at the JYFLTRAP Penning trap is given, with a focus on nuclei discussed in the PLATAN2019 meeting.

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Nuclear Data and Experiments for Astrophysics

Kankainen

Goriely

2022

The Euroschool on Exotic Beams, Vol. VI

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Nuclear astrophysics aims to understand the origin of elements and the role of nuclear processes in astrophysical events. Nuclear reactions and reaction rates depend strongly on nuclear properties and on the astrophysical environment. Nuclear inputs for stellar reaction rates involve a variety of nuclear properties, theoretical models, and experimental data. Experiments providing data for nuclear astrophysics range from stable ion beam direct measurements to radioactive beam experiments employing inverse kinematics or indirect methods. Many properties relevant for astrophysical calculations, such as nuclear masses and β-decays, have also been intensively studied. This contribution shortly introduces selected astrophysical processes, discusses the related nuclear data needs, and gives examples of recent experimental and theoretical efforts in the field. Origin of Elements and Nucleosynthesis Processes The Composition of the UniverseOur knowledge of the composition of the Universe in general, and of our Solar System in particular, results almost entirely from the analysis of electromagnetic spectra originating from the various observable sources in the Universe, i.e., the

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Isomeric fission yield ratios for odd-mass Cd and In isotopes using the phase-imaging ion-cyclotron-resonance technique

Cited by 21 publications

References 75 publications

Extraction of angular momenta from isomeric yield ratios

Extraction of angular momenta from isomeric yield ratios

Recent experiments at the JYFLTRAP Penning trap

Nuclear Data and Experiments for Astrophysics

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