SHELL EFFECT MANIFESTATION IN MASS-ENERGY DISTRIBUTIONS OF FISSION AND QUASI-FISSION FRAGMENTS OF NUCLEI WITH Z=102-122

2005 ◽  
Author(s):  
E. V. PROKHOROVA ◽  
A. A. BOGACHEV ◽  
I. M. ITKIS ◽  
M. G. ITKIS ◽  
M. JANDEL ◽  
...  
Keyword(s):  
Shell Effect ◽  
Mass Energy ◽  
Energy Distributions ◽  
Fission Fragments

MASS-ENERGY DISTRIBUTIONS OF FISSION FRAGMENTS OF SUPERHEAVY NUCLEI PRODUCED IN THE REACTIONS WITH 48CA IONS

2002 ◽  
Author(s):  
E. V. PROKHOROVA ◽  
M. G. ITKIS ◽  
YU. TS. OGANESSIAN ◽  
E. M. KOZULIN ◽  
A. A. BOGATCHEV ◽  
...  
Keyword(s):  
Superheavy Nuclei ◽  
Mass Energy ◽  
Energy Distributions ◽  
Fission Fragments

Investigation of the 208Pb(18O, f) fission reaction: Mass-energy distributions of fission fragments and their correlation with the gamma-ray multiplicity

2008 ◽  
Vol 71 (6) ◽  
pp. 956-981 ◽  
Author(s):  
A. Ya. Rusanov ◽  
M. G. Itkis ◽  
N. A. Kondratiev ◽  
V. V. Pashkevich ◽  
I. V. Pokrovsky ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Reaction Mass ◽  
Mass Energy ◽  
Fission Reaction ◽  
Energy Distributions ◽  
Fission Fragments

Possible explanation of fine structures in mass-energy distribution of fission fragments

2004 ◽  
Vol 22 (1) ◽  
pp. 51-60 ◽  
Author(s):  
A. V. Andreev ◽  
G. G. Adamian ◽  
N. V. Antonenko ◽  
S. P. Ivanova ◽  
W. Scheid
Keyword(s):  
Energy Distribution ◽  
Mass Energy ◽  
Fission Fragments ◽  
Fine Structures

ENERGY PARTITION IN 235U FISSION REACTION INDUCED BY THERMAL NEUTRON

2012 ◽  
Vol 21 (08) ◽  
pp. 1250073 ◽  
Author(s):  
YONG-JING CHEN ◽  
JING QIAN ◽  
TING-JIN LIU ◽  
ZHU-XIA LI ◽  
XI-ZHEN WU ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Heavy Fragment ◽  
Incident Neutron ◽  
Shell Effect ◽  
Incident Neutron Energy ◽  
Energy Partition ◽  
Fission Reaction ◽  
Fission Fragments ◽  
Total Excitation Energy ◽  
235U Fission

The partition of the total excitation energy between the fission fragments for the n th +235 U and n(En = 5.55 MeV)+235 U fission reactions are analyzed with the experimental data available. Our results show that the total excitation energy is not shared by the fragments in proportion of their masses but support the so-called energy sorting-mechanism. The temperature of the heavy fragment is generally lower than that of the light one when the shell effect does not play a strong role. As soon as the mass of heavy fragment closes to 132, its temperature becomes higher than the complementary light one because of strong shell effect. Our results also show that the heavy fragments gain more energy than the complementary light ones when the incident neutron energy increases.

scholarly journals Experimental estimation of the “scission” neutron yield in the thermal neutron induced fission of 233U and 235U

2020 ◽  
Vol 239 ◽  
pp. 05008
Author(s):  
Alexander Vorobyev ◽  
Oleg Shcherbakov ◽  
Alexei Gagarski ◽  
Gennadi’ski Val ◽  
Tatiana’mina Kuz
Keyword(s):  
Thermal Neutron ◽  
Neutron Yield ◽  
Research Reactor ◽  
Center Of Mass ◽  
Energy Distributions ◽  
Mass System ◽  
Fission Fragments ◽  
Experimental Estimation ◽  
Fission Neutrons ◽  
Induced Fission

The analysis of angular and energy distributions of prompt neutrons from the thermal neutron induced fission of 233U and 235U measured recently in the WWR-M research reactor (Gatchina, Russia) have been performed. The yield of “scission” neutrons has been estimated by comparing the measured distributions with calculations within the model of emission of neutrons from completely accelerated fragments. Besides taking into account “scission” neutrons, for the best description of measured angular and energy distributions of fission neutrons, the calculation should be performed under the assumption that neutrons with a higher (7-9%) probability are emitted along the fission axis in the center-of-mass system of fission fragments.

Investigating Mass–Energy Distributions of Fragments Produced in the 32S + 232Th → 264Sg Reaction at Energies Below and Near the Coulomb Barrier

2021 ◽  
Vol 85 (10) ◽  
pp. 1085-1089
Author(s):  
E. I. Galkina ◽  
E. M. Kozulin ◽  
G. N. Knyazheva ◽  
I. M. Itkis ◽  
A. A. Bogachev ◽  
...  
Keyword(s):  
Coulomb Barrier ◽  
Mass Energy ◽  
Energy Distributions

INDEPENDENT YIELDS OF 124Sb AND 126sb IN THERMAL NEUTRON INDUCED FISSION AND THEIR IMPLICATION ON THE EMPIRICAL Zp FUNCTION

1965 ◽  
Vol 43 (9) ◽  
pp. 2493-2507 ◽  
Author(s):  
P. O. Strom ◽  
G. R. Grant ◽  
A. C. Pappas
Keyword(s):  
Thermal Neutron ◽  
Charge Distribution ◽  
Distribution Curve ◽  
Neutron Emission ◽  
Shell Effect ◽  
Shell Effects ◽  
Fission Fragments ◽  
Induced Fission ◽  
Fission Yields ◽  
Proton Shell

The independent fission yields in thermal neutron induced fission of 235U have been measured to be (9.5 ± 1.4)•10−6% and (1.04 ± 0.17)•10−3% for 124gSb and 126gSb, respectively. The total independent yields for all isomers of these nuclides are estimated to be (1.2 ± 0.2)•10−5% for 124Sb and (3.7 ± 0.6)•10−3% for 126Sb using a Huizenga–Vandenbosch approach for estimating population of isomeric states.These data do not seem to support a 50 proton shell effect on the Zp function, using the "unique" charge distribution curve of Wahl. A revised Wahl plot based on recent information on neutron emission from individual fission fragments is given and discussed in view of shell effects in fission. It is shown that the effect of the Zp function of the 50 proton shell is very small.

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