scholarly journals Scission-point model predictions of fission-fragment mass and total kinetic energy distributions for 236U and 252Cf

2017 ◽  
Vol 146 ◽  
pp. 04055
Author(s):  
Fedor Ivanyuk ◽  
Franz-Josef Hambsch ◽  
Nicolae Carjan
Keyword(s):  
Kinetic Energy ◽  
Fission Fragment ◽  
Total Kinetic Energy ◽  
Point Model ◽  
Energy Distributions ◽  
Scission Point ◽  
Fragment Mass ◽  
Model Predictions ◽  
Kinetic Energy Distributions

scholarly journals Fission fragment mass and total kinetic energy distributions of spontaneously fissioning plutonium isotopes

2018 ◽  
Vol 169 ◽  
pp. 00016 ◽  
Author(s):  
K. Pomorski ◽  
B. Nerlo-Pomorska ◽  
J. Bartel ◽  
C. Schmitt
Keyword(s):  
Kinetic Energy ◽  
Fission Fragment ◽  
Potential Energy Surfaces ◽  
Total Kinetic Energy ◽  
Energy Distributions ◽  
Plutonium Isotopes ◽  
Fragment Mass ◽  
Calculated Mass ◽  
Fission Probability ◽  
Kinetic Energy Distributions

The fission-fragment mass and total kinetic energy (TKE) distributions are evaluated in a quantum mechanical framework using elongation, mass asymmetry, neck degree of freedom as the relevant collective parameters in the Fourier shape parametrization recently developed by us. The potential energy surfaces (PES) are calculated within the macroscopic-microscopic model based on the Lublin-Strasbourg Drop (LSD), the Yukawa-folded (YF) single-particle potential and a monopole pairing force. The PES are presented and analysed in detail for even-even Plutonium isotopes with A = 236–246. They reveal deep asymmetric valleys. The fission-fragment mass and TKE distributions are obtained from the ground state of a collective Hamiltonian computed within the Born-Oppenheimer approximation, in the WKB approach by introducing a neck-dependent fission probability. The calculated mass and total kinetic energy distributions are found in good agreement with the data.

scholarly journals Fission modes in fermium isotopes with Brownian shape-motion model

2019 ◽  
Vol 223 ◽  
pp. 01002 ◽  
Author(s):  
Martin Albertsson ◽  
B. Gillis Carlsson ◽  
Thomas Døssing ◽  
Peter Möller ◽  
Jørgen Randrup ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Excitation Energy ◽  
Fission Fragment ◽  
Total Kinetic Energy ◽  
Motion Model ◽  
Energy Distributions ◽  
Fragment Mass ◽  
Symmetric Fission ◽  
Asymmetric Fission ◽  
Kinetic Energy Distributions

Fission-fragment mass and total-kinetic-energy distributions following fission of the fermium isotopes 256,258,260Fm at low excitation energy have been calculated using the Brownian shape-motion model. A transition from asymmetric fission in 256Fm to symmetric fission in 258Fm is obtained. The total-kinetic-energy distributions for the three isotopes show radically different behaviour due to varying contributions from different fission modes, with a double-humped distribution for 258Fm.

scholarly journals Correlated transitions in symmetric and dominant fission modes, and multipole moments of fission fragments

2020 ◽  
Vol 242 ◽  
pp. 03004
Author(s):  
Satoshi Chiba ◽  
Mark D. Usang ◽  
Chikako Ishizuka ◽  
Fedir Ivanyuk ◽  
Zhang Xuan
Keyword(s):  
Kinetic Energy ◽  
Total Kinetic Energy ◽  
Multipole Moments ◽  
Energy Distributions ◽  
Langevin Model ◽  
Fragment Mass ◽  
Fission Fragments ◽  
Kinetic Energy Distributions

Systematic and anomalous trends in fragment mass and TKE (total kinetic energy) distributions are investigated in terms of 4D Langevin model developed at Tokyo Tech. We have found that correlated transitions in symmetric components and dominant modes (symmetric v.s. asymmetric) can explain the prominent systematic and anomalous features of fission observables. We have also elucidated that interplay between spherical and deformed magicity at A=132 and A=142 to 144 is important in both observables.

BIMODAL FISSION IN 258FM

1986 ◽  
Vol 01 (06) ◽  
pp. 377-381 ◽  
Author(s):  
K. DEPTA ◽  
J.A. MARUHN ◽  
W. GREINER ◽  
W. SCHEID ◽  
A. SANDULESCU
Keyword(s):  
Kinetic Energy ◽  
Shell Model ◽  
Fission Products ◽  
Degree Of Freedom ◽  
Total Kinetic Energy ◽  
Heavy Nuclei ◽  
Energy Distributions ◽  
Decay Channels ◽  
Symmetric Fission ◽  
Kinetic Energy Distributions

Within the 2-center shell model we present an explanation for the mass and total-kinetic-energy distributions of fission products of very heavy nuclei called “bimodal fission.” For the case of 258 FM we show that the symmetric fission can be described by a 2-dimensional treatment of the elongation and neck degree of freedom. Owing to shell corrections the system fissions via two decay channels that have distinct kinetic energies.

Fragment mass and kinetic energy distributions from fission of light actinides

1994 ◽  
Vol 213-214 ◽  
pp. 417-419
Author(s):  
I. Nishinaka ◽  
M. Tanikawa ◽  
S. Miyamoto ◽  
K. Sueki ◽  
H. Nakahara ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Energy Distributions ◽  
Fragment Mass ◽  
Kinetic Energy Distributions
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