Accurate measurements of fission-fragment yields in<sup>234,235,236,238</sup>U(<i>γ</i>,f) with the SOFIA set-up

Chatillon, A.; Taïeb, J.; Martin, Julie-Fiona; Pellereau, E.; Boutoux, G.; Gorbinet, T.; Grente, L.; Bélier, G.; Bouchet, L.; Álvarez‐Pol, H.; Ayyad, Y.; Benlliure, J.; Caamaño, M.; Audouin, L.; Casarejos, E.; Cortina-Gil, D.; Farget, F.; Fernández–Domínguez, B.; Heinz, A.; Jurado, B.; Kelić-Heil, A.; Kurz, N.; Lindberg, Simon; Löher, B.; Nociforo, C.; Paradela, C.; Ramos, D.; Rodríguez-Sànchez, J. L.; Rodríguez–Tajes, C.; Rossi, D.; Schmidt, K.‐H.; Simon, H.; Tassan‐Got, L.; Törnqvist, H.; Vargas, J. E. Ramirez; Voss, B.; Weick, H.; Yan, Y.

doi:10.1051/epjconf/201611108001

Cited by 5 publications

(11 citation statements)

References 22 publications

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“…This effect makes their Z and A identification much easier. For example, values of δZ ∼ 0.35 and δA ∼ 0.6 to 0.8 were obtained in the recent SOFIA experiment [71,28].…”

Section: Boosting the Fission-fragment Energies For Improving The Masmentioning

confidence: 90%

“…5 5 25, 26,27] and references therein. An odd-even staggering in the yields [28], angular momenta [29], kinetic energies, and prompt-neutron multiplicities [30] for fission fragments with even or odd numbers of protons and neutrons reflects the influence of pairing correlations on the fission process. Moreover, fragment-mass-dependent data on prompt-neutron and prompt-gamma emission after scission reveal how much of the available energy release ends up in the excitation energies of the individual fragments.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…While the 1996 experiment mentioned above [40] has been fully analyzed, and all results have been published, the SOFIA experiments [71,11,28] are still under analysis, and, therefore, only some first results are presented in this review.…”

Section: Fission In Inverse Kinematicsmentioning

confidence: 99%

“…Fig. 18 shows the production of the secondary beams at the FRS of GSI as it was used in the SOFIA experiments on low-energy fission in inverse kinematics [71,11,28]. This part of the experimental set-up is very similar to the one used in the 1996 experiment [40], except that in that experiment the fission set-up was mounted directly behind the FRS.…”

Section: Page 21 Of 77 Author Submitted Manuscript -Ropp-100800r2mentioning

confidence: 99%

“…The excitation energy amounts to about 27 MeV per abraded nucleon on the average [250], and the angular-A c c e p t e d M a n u s c r i p t Figure 18. (Color online) Left part: Schematic view of the FRS that provided the radioactive beams for the experiments in inverse kinematics at GSI, Darmstadt [40,71,11,28]. A multitude of different radioactive nuclides is produced by the fragmentation of a 1 A GeV 238 U primary beam in a thick beryllium target.…”

Section: Page 21 Of 77 Author Submitted Manuscript -Ropp-100800r2mentioning

confidence: 99%

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Nuclear fission: a review of experimental advances and phenomenology

2017

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In the last two decades, through technological, experimental and theoretical advances, the situation in experimental fission studies has changed dramatically. With the use of advanced production and detection techniques both much more detailed and precise information can now be obtained for the traditional regions of fission research and, crucially, new regions of nuclei have become routinely accessible for fission studies. This work first of all reviews the recent developments in experimental fission techniques, in particular the resurgence of transfer-induced fission reactions with light and heavy ions, the emerging use of inverse-kinematic approaches, both at Coulomb and relativistic energies, and of fission studies with radioactive beams. The emphasis on the fission-fragment mass and charge distributions will be made in this work, though some of the other fission observables, such as prompt neutron and γ-ray emission will also be reviewed. A particular attention will be given to the low-energy fission in the so far scarcely explored nuclei in the very neutron-deficient lead region. They recently became the focus for several complementary experimental studies, such as β-delayed fission with radioactive beams at ISOLDE(CERN), Coulex-induced fission of relativistic secondary beams at FRS(GSI), and several prompt fusion-fission studies. The synergy of these approaches allows a unique insight in the new region of asymmetric fission around [Formula: see text]Hg, recently discovered at ISOLDE. Recent extensive theoretical efforts in this region will also be outlined. The unprecedented high-quality data for fission fragments, completely identified in Z and A, by means of reactions in inverse kinematics at FRS(GSI) and VAMOS(GANIL) will be also reviewed. These experiments explored an extended range of mercury-to-californium elements, spanning from the neutron-deficient to neutron-rich nuclides, and covering both asymmetric, symmetric and transitional fission regions. Some aspects of heavy-ion induced fusion-fission and quasifission reactions will be also discussed, which reveal their dynamical features, such as the fission time scale. The crucial role of the multi-chance fission, probed by means of multinucleon-transfer induced fission reactions, will be highlighted. The review will conclude with the discussion of the new experimental fission facilities which are presently being brought into operation, along with promising 'next-generation' fission approaches, which might become available within the next decade.

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“…This effect makes their Z and A identification much easier. For example, values of δZ ∼ 0.35 and δA ∼ 0.6 to 0.8 were obtained in the recent SOFIA experiment [71,28].…”

Section: Boosting the Fission-fragment Energies For Improving The Masmentioning

confidence: 90%

Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Fission In Inverse Kinematicsmentioning

confidence: 99%

Section: Page 21 Of 77 Author Submitted Manuscript -Ropp-100800r2mentioning

confidence: 99%

Section: Page 21 Of 77 Author Submitted Manuscript -Ropp-100800r2mentioning

confidence: 99%

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Nuclear fission: a review of experimental advances and phenomenology

2017

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Low energy nuclear physics with active targets and time projection chambers

Bazin

Ahn

Ayyad

et al. 2020

Progress in Particle and Nuclear Physics

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Light charged particles emitted in fission reactions induced by protons onPb208

et al. 2016

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Light charged particles emitted in proton-induced fission reactions on 208 Pb have been measured at different kinetic energies: 370A, 500A, and 650A MeV. The experiment was performed by the SOFIA Collaboration at the GSI facilities in Darmstadt (Germany). The inverse kinematics technique was combined with a setup especially designed to measure light charged particles in coincidence with fission fragments. This measurement allowed us, for the first time, to obtain correlations between the light charged particles emitted during the fission process and the charge distributions of the fission fragments. These correlations were compared with different model calculations to assess the ground-to-saddle dynamics. The results confirm that transient and dissipative effects are required for an accurate description of the fission observables.

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Accurate measurements of fission-fragment yields in^{234,235,236,238}U(γ,f) with the SOFIA set-up

Cited by 5 publications

References 22 publications

Nuclear fission: a review of experimental advances and phenomenology

Nuclear fission: a review of experimental advances and phenomenology

Low energy nuclear physics with active targets and time projection chambers

Light charged particles emitted in fission reactions induced by protons onPb208

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Accurate measurements of fission-fragment yields in234,235,236,238U(γ,f) with the SOFIA set-up

Cited by 5 publications

References 22 publications

Nuclear fission: a review of experimental advances and phenomenology

Nuclear fission: a review of experimental advances and phenomenology

Low energy nuclear physics with active targets and time projection chambers

Light charged particles emitted in fission reactions induced by protons onPb208

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Product

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Accurate measurements of fission-fragment yields in^{234,235,236,238}U(γ,f) with the SOFIA set-up