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The reaction mechanism of nucleus-nucleus collisions at projectile energies around the Fermi energy is investigated with emphasis on the production of fragmentation-like residues. The results of simulations are compared to experimental mass…

Nuclear Theory · Physics 2008-11-26 M. Veselsky , G. A. Souliotis

The Coulomb effect hypothesis in cold fission, formerly used to interpret fluctuations in the curve of maximal total kinetic energy as a function of fragments mass, in reactions 233U(nth,f), 235U(nth,f) and 239Pu(nth,f), is confirmed by the…

Nuclear Experiment · Physics 2013-10-07 Modesto Montoya

We have decomposed to symmetric and asymmetric modes the mass-TKE fission fragment distributions calculated by 4-dimensional Langevin approach and observed how the dominant fission mode and symmetric mode change as functions of…

Nuclear Theory · Physics 2026-05-06 M. D. Usang , F. Ivanyuk , C. Ishizuka , S. Chiba

Fission in 3He and 4He induced reactions at excitation energies between the fission barrier and 140 MeV has been investigated. Twentythree fission excitation functions of various compound nuclei in different mass regions are shown to scale…

Nuclear Experiment · Physics 2007-05-23 Th. Rubehn , K. X. Jing , L. G. Moretto , L. Phair , K. Tso , G. J. Wozniak

We report on a comprehensive systematics of fusion-evaporation and/or fusion-fission cross sections for a very large variety of systems over an energy range 4-155 A.MeV. Scaled by the reaction cross sections, fusion cross sections do not…

Nuclear Experiment · Physics 2015-06-11 Ph. Eudes , Z. Basrak , F. Sébille , V. de la Mota , G. Royer , M. Zorić

Static self-consistent methods usually allow to determine the most probable fission fragments mass asymmetry. We have applied random neck rupture mechanism to the nuclei in the configuration at the end of fission paths. Fission fragment…

Nuclear Theory · Physics 2015-02-20 M. Warda , A. Zdeb

The yields of light elements ($Z=1,2$) obtained from spontaneous ternary fission of $^{252}$Cf are treated within a nonequilibrium approach, and the contribution of unstable nuclei and excited bound states is taken into account. These light…

Nuclear Theory · Physics 2020-10-28 G. Röpke , J. B. Natowitz , H. Pais

A review of the characteristic features found in fully energy-damped, binarydecay yields from light heavy-ion reactions with $20\leq A_{target} + A_{projectile}\leq 80$ is presented. The different aspects of these yields that have been used…

Nuclear Experiment · Physics 2016-08-15 S. J. Sanders , A. Szanto de Toledo , C. Beck

Moller and Randrup presented a comprehensive calculation, based on the Brownian shape motion (BSM) method, of fission-fragment charge distributions [Phys. Rev. C 91 (2015) 044316 ] which obtained that ``a new region of asymmetry'' appeared…

Nuclear Theory · Physics 2025-02-25 Peter Möller , Christelle Schmitt

Mechanism of nuclear reactions on 197Au induced by 11B ions at energies above Coulomb barrier was studied by induced-activity method and gamma-spectroscopy. The cross sections of the reaction fragments from 197Au induced by 11B ions were…

Nuclear Experiment · Physics 2016-11-01 G. S. Karapetyan , N. A. Demekhina , A. R. Balabekyan

Ternary fission yields in the reaction 241Pu(nth,f) are calculated using a new model which assumes a nucleation-time moderated chemical equilibrium in the low density matter which constitutes the neck region of the scissioning system. The…

Nuclear Experiment · Physics 2015-06-19 S. Wuenschel , H. Zheng , K. Hagel , B. Meyer , M. Barbui , E. J. Kim , G. Roepke , J. B. Natowitz

We perform energy dependent calculations of independent and cumulative fission product yields for $^{235}$U, $^{238}$U, and $^{239}$Pu in the first chance fission region. Starting with the primary fission fragment distributions taken from…

Nuclear Theory · Physics 2021-02-02 S. Okumura , T. Kawano , A. E. Lovell , T. Yoshida

The mass and total kinetic energy distributions of the fission fragments in the fission of even-even isotopes of superheavy elements from Hs (Z=108) to Og (Z=118) are estimated using a pre-scission point model. We restrict to nuclei for…

Nuclear Theory · Physics 2019-06-19 N. Carjan , F. A. Ivanyuk , Yu. Ts. Oganessian

Simple approach is used to a description of the experimental data for the widths of fission fragment mass yields in 197Au and 209Bi at low and intermediate energies. This approach based on both the expression for the temperature dependence…

Nuclear Theory · Physics 2019-01-30 V. Yu. Denisov , O. A. Belyanovska , V. P. Khomenkov , I. Yu. Sedykh , K. M. Sukhyy

According to the driving potential of a fissile system, we propose a phenomenological fission potential for a description of the pre-neutron emission mass distributions of neutron-induced actinide fission. Based on the nucleus-nucleus…

Nuclear Theory · Physics 2015-06-03 Xiaojun Sun , Chenggang Yu , Ning Wang

Background: The influence of shell effect on the dynamics of the fusion fission process and it's evolution with excitation energy in the pre-actinide Hg-Pb region in general is a matter of intense research in recent years. In particular, a…

We investigate the cold fission/fusion paths of superheavy nuclei within the two center shell model, in order to find the best projectile-target combinations of their production. The fission/fusion yields are estimated by using the…

Nuclear Theory · Physics 2008-05-07 M. Mirea , D. S. Delion , A. Sandulescu

$^{180}$Hg is experimentally found to fission asymmetrically. This result was not expected as a naive fragment shell effects study would support the symmetric mode to be the most probable. In the present study we investigate both symmetric…

Nuclear Theory · Physics 2024-09-05 Bernard Remi , Simenel Cedric , Blanchon Guillaume , Lau Ngee-Wein , McGlynn Patrick

Ternary fission of actinides probes the state of the nucleus at scission. Light clusters are produced in space and time very close to the scission point. Within the nonequilibrium statistical operator method, a generalized Gibbs…

Nuclear Theory · Physics 2021-06-09 G. Röpke , J. B. Natowitz , H. Pais

For the first time, we apply the temperature dependent relativistic mean field (TRMF) model to study the ternary fission of heavy nucleus using level density approach. The probability of yields of a particular fragment is obtained by…

Nuclear Theory · Physics 2017-06-28 M. T. Senthil Kannan , Bharat Kumar , M. Balasubramaniam , B. K. Agrawal , S. K. Patra