Experimental fission study using multi-nucleon transfer reactions

Nishio, K.; Hirose, K.; Léguillon, R.; Makii, H.; Orlandi, R.; Smallcombe, J.; Chiba, Satoshi; Aritomo, Y.; Tanaka, Shouya; Ohtsuki, T.; Tsekhanovich, I.; Petrache, C. M.; Andreyev, A. N.

doi:10.1051/epjconf/201714604009

Cited by 3 publications

(2 citation statements)

References 18 publications

(10 reference statements)

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“…E n = 20 MeV, the contrib ution of first-chance fission is less than each of the second-and third-chance fission 13 . These features are demonstrated by figure 50 from [319], based on the recent MNT-induced studies at JAEA. This figure compares the experimental data for fission of 238 U * at the initial excitation energy E * = 35 MeV with the Langevin calculation taking into account multi-chance fission.…”

Section: Fission Studies By Means Of Few-and Multi-nucleon Transfer R...mentioning

confidence: 81%

“…Figure 50. Experimental FFMD of 238 U * (blue symbols) measured at the initial excitation energy of 35 MeV, obtained from the inelastic scattering channel of the reaction 238 U( 18 O, 18 O)238 U * (ff)[319], is compared with the Langevin calculation[314] taking into account multi-chance fission. The solid red curve shows the final calculated FFMD, where the contributions from every multi-chance fission are shown by the dashed curves with different colors.…”

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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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Section: Fission Studies By Means Of Few-and Multi-nucleon Transfer R...mentioning

confidence: 81%

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confidence: 99%

Nuclear fission: a review of experimental advances and phenomenology

2017

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Hauser-Feshbach fission fragment de-excitation with calculated macroscopic-microscopic mass yields

et al. 2018

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The Hauser-Feshbach statistical model is applied to the de-excitation of primary fission fragments using input mass yields calculated with macroscopic-microscopic models of the potential energy surface. We test the sensitivity of the prompt fission observables to the input mass yields for two important reactions, 235 U(n th , f ) and 239 Pu(n th , f ), for which good experimental data exist. General traits of the mass yields, such as the location of the peaks and their widths, can impact both the prompt neutron and γ-ray multiplicities, as well as their spectra. Specifically, we use several mass yields to determine a linear correlation between the calculated prompt neutron multiplicityν and the average heavy-fragment mass A h of the input mass yields ∂ν/∂ A h = ±0.1 n/f /u. The mass peak width influences the correlation between the total kinetic energy of the fission fragments and the total number of prompt neutrons emittedνT (TKE) . Typical biases on prompt particle observables from using calculated mass yields instead of experimental ones are: δν = 4% for the average prompt neutron multiplicity, δM γ = 1% for the average prompt γ-ray multiplicity, δ¯ LAB n = 1% for the average outgoing neutron energy, δ¯ γ = 1% for the average γ-ray energy, and δ TKE = 0.4% for the average total kinetic energy of the fission fragments.

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Mass Distribution of the Fission Products of Plutonium Isotopes as Calculated by Using a Semi-empirical Model

Lee

Park

et al. 2020

J. Korean Phys. Soc.

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Experimental fission study using multi-nucleon transfer reactions

Cited by 3 publications

References 18 publications

Nuclear fission: a review of experimental advances and phenomenology

Nuclear fission: a review of experimental advances and phenomenology

Hauser-Feshbach fission fragment de-excitation with calculated macroscopic-microscopic mass yields

Mass Distribution of the Fission Products of Plutonium Isotopes as Calculated by Using a Semi-empirical Model

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