Nuclear-charge polarization at scission in the 12 MeV proton-induced fission of 232Th

Nishinaka, I.; Nakahara, Hiromichi; Nagame, Y.

doi:10.1140/epja/i2007-10437-y

Cited by 5 publications

(3 citation statements)

References 48 publications

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“…The quasifission origin for the observed massasymmetric fission events in this case was proven by measuring the fission-fragment angular distributions, see details in [142]. By assuming the neutronto-proton ratio being equilibrated in QF in the reaction 48 Ca+ 154 Sm, the FFs neutron and proton numbers should correspond to (Z L ,N L ) = (25,36) and (Z H ,N H ) = (57,84). This suggests the influence of the neutron shell at N = 82 in the heavy fragment as the main reason for the observed mass peaks in QF in this case.…”

Section: Page 46 Of 77 Author Submitted Manuscript -Ropp-100800r2mentioning

confidence: 99%

“…Recent examples of the application of this method include e.g. photofission and neutron-induced fission of 238 U [55,56] and proton-induced fission of 232 Th [57]. • In-beam (prompt) fission experiments, in which the fission detectors directly face the thin reaction target, allowing the observation of fission fragments in a compact geometry.…”

Section: Beams Direct Kinematics Inverse Kinematicsmentioning

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: Page 46 Of 77 Author Submitted Manuscript -Ropp-100800r2mentioning

confidence: 99%

Section: Beams Direct Kinematics Inverse Kinematicsmentioning

confidence: 99%

Nuclear fission: a review of experimental advances and phenomenology

2017

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“…The conditions for the calculations are shown in red character. collision-fission events (for the charge equilibration dynamics in collision-fission events, see [9,10,11]). The reason is that quantum mechanical time-evolution including the nucleon degrees of freedom is desired to determine the time evolution of charge distribution.…”

Section: Fission After Collision 21 Charge Equilibrium Hypothesismentioning

confidence: 99%

Present Status of Fission Research Based on TDDFT

Iwata

2015

Preprint

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Fission resulting from collision of atomic nuclei is systematically investigated based on time-dependent density functional calculations. Time-dependent density functional theory (TDDFT) is a framework, which enables us to treat quantum many-body dynamics with nucleon degrees of freedom. In this article a theoretical framework called "Composite-Nucleus Constrained TDDFT" is introduced, and charge equilibrium hypothesis for collision fission dynamics is examined.

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Multinucleon-Transfer-Induced Fission

Nishio

2022

Handbook of Nuclear Physics

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Nuclear-charge polarization at scission in the 12 MeV proton-induced fission of 232Th

Cited by 5 publications

References 48 publications

Nuclear fission: a review of experimental advances and phenomenology

Nuclear fission: a review of experimental advances and phenomenology

Present Status of Fission Research Based on TDDFT

Multinucleon-Transfer-Induced Fission

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