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The dependence of fission barriers on the excitation energy of the compound nucleus impacts the survival probability of superheavy nuclei synthesized in heavy-ion fusion reactions. In this work, we investigate the isentropic fission…

Nuclear Theory · Physics 2009-06-30 J. C. Pei , W. Nazarewicz , J. A. Sheikh , A. K. Kerman

Fusion - fission probabilities in the synthesis of heaviest elements are discussed in the context of the latest experimental reports. Cross sections for superheavy nuclei are evaluated using "Fusion by Diffusion" (FBD) model. Predictive…

Quasi-fission (QF) reactions occur in fully damped heavy-ion collisions without the formation of an equilibrated compound nucleus, leading to the formation of fragments with similar properties as in fission reactions. Similar shell effects…

Nuclear Theory · Physics 2024-10-14 Hyeonseop Lee , Patrick McGlynn , Cedric Simenel

Fusion-fission and fully energy-damped binary processes of the $^{35}$Cl+$^{24}$Mg reaction were investigated using particle-particle coincidence techniques at a $^{35}$Cl bombarding energy of E$_{lab}$ $\approx$ 8 MeV/nucleon. Inclusive…

Nuclear Experiment · Physics 2019-08-17 C. Beck , Sl. Cavallaro , R. Dayras

We discuss the origin of the narrowness of the single peak at mass-symmetric division in the fragment mass-yield curve for spontaneous fission of $^{258}$Fm. For this purpose, we employ the macroscopic-microscopic model, and calculate a…

Nuclear Theory · Physics 2009-01-22 Takatoshi Ichikawa , Akira Iwamoto , Peter Möller

Background: A quantitative microscopic understanding of the fission-fragment yield distributions represents a major challenge for nuclear theory as it involves the intricate competition between large-amplitude nuclear collective motion and…

Nuclear Theory · Physics 2022-02-02 Jhilam Sadhukhan , Samuel A. Giuliani , Witold Nazarewicz

A rapidly converging 4-dimensional Fourier shape parametrization is used to model the fission process of heavy nuclei. Potential energy landscapes are computed within the macroscopic-microscopic approach, on top of which the…

The measurement for charge distributions of fragments in 252Cf has been performed by using a unique style of detector setup consisting of a typical grid ionization chamber and a dE-E particle telescope. We found that the fragment mass…

Nuclear Experiment · Physics 2015-12-01 Taofeng Wang , Liping Zhu , Liming Wang , Qinghua Men , Hongyin Han , Haihong Xia

Mass distributions of fission fragments arising from the slow quasi-fission process have been derived by comparing the measured distributions with the theoretical distributions based on compound nuclear fission model for several reactions.…

Based on a wide systematics of fission-fragment distributions measured in low-energy fission, the even-odd staggering in the fission-fragment element yields is investigated. The well-established evolution of the global even-odd effect with…

Nuclear Experiment · Physics 2010-09-14 M. Caamano , F. Rejmund , K. -H. Schmidt

Fission barriers heights and excitation energies of superdeformed isomeric minima are calculated within the microscopic - macroscopic Woods - Saxon model for 75 actinide nuclei for which the experimental data are known. State - of - the -…

Nuclear Theory · Physics 2020-01-22 P. Jachimowicz , M. Kowal , J. Skalski

Fragment properties of hot fragmenting sources of similar sizes produced in central and semi-peripheral collisions are compared in the excitation energy range 5-10 AMeV. For semi-peripheral collisions a method for selecting compact…

The understanding of the antineutrino production in fission and the theoretical calculation of their energy spectra in different types of fission reactors rely on the application of the summation method, where the individual contributions…

Nuclear Experiment · Physics 2020-12-16 K. -H. Schmidt , M. Estienne , M. Fallot , S. Cormon , A. Cucoanes , B. Jurado , K. Kern , Ch. Schmitt , T. Shiba

Isotopic series of 58 neutron-deficient secondary projectiles (205,206At, 205-209Rn, 208-212,217,218Fr, 211-223Ra, 215-226Ac, 221-229Th, 226-231Pa, 231-234U) were produced by projectile fragmentation using a 1 A GeV 238U beam. Cross…

The time dependent equations of motion for the pair breaking effect were corroborated with a condition that fixes dynamically the number of particles on the two fission fragment. The single particle level scheme was calculated with the…

Nuclear Theory · Physics 2015-06-17 M. Mirea

We present a theoretical analysis of inclusive photoproduction of phi mesons in nuclei. In particular the dependence of the total phi meson yield on the target mass number is investigated. The calculations are done using the semi-classical…

Nuclear Theory · Physics 2008-11-26 P. Muehlich , U. Mosel

The amount of emitted prompt neutrons from the fission fragments increases as a function of excitation energy. Yet it is not fully understood whether the increase in \nu(A) as a function of E_{n} is mass dependent. The share of excitation…

Nuclear Experiment · Physics 2013-04-09 A. Al-Adili , F. -J. Hambsch , S. Pomp , S. Oberstedt

The cold(neutronless) fission of $^{252}$Cf is studied in the frame of a molecular model in which the scission configuration is described by two aligned fragments interacting by means of Coulomb (+ nuclear) forces. The study is carried out…

Nuclear Theory · Physics 2007-05-23 S. Misicu , P. Quentin

Recent experiments [Phys. Rev. Lett. 123, 092503(2019); Phys. Rev. Lett. 118, 222501 (2017)] have made remarkable progress in measurements of the isotopic fission-fragment yields of the compound nucleus $^{239}$U, which is of great…

Nuclear Theory · Physics 2021-04-07 C. Y. Qiao , J. C. Pei , Z. A. Wang , Y. Qiang , Y. J. Chen , N. C. Shu , Z. G. Ge

The possibilities of the proposed statistical approach are shown in the task of investigating the post-scission transformation of mass and charge yields of fission fragments with considering the emission of different length of chains of…

Nuclear Theory · Physics 2019-07-12 V. T. Maslyuk , O. O. Parlag , M. I. Romanyuk , O. I. Lendyel , O. M. Pop
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