Role of shape dependence of dissipation on nuclear fission

2010 ◽  
Vol 81 (3) ◽  
Author(s):  
Jhilam Sadhukhan ◽  
Santanu Pal
Keyword(s):  
Nuclear Fission ◽  
Shape Dependence

scholarly journals Isospin Conservation in Neutron Rich Systems of Heavy Nuclei

2018 ◽  
Vol 178 ◽  
pp. 05007 ◽  
Author(s):  
Ashok Kumar Jain ◽  
Swati Garg
Keyword(s):  
Theoretical Calculation ◽  
Fission Fragment ◽  
Nuclear Fission ◽  
Heavy Ion ◽  
Mass Region ◽  
Fission Reactions ◽  
Heavy Nuclei ◽  
Practical Applications ◽  
Heavy Ion Fusion

It is generally believed that isospin would diminish in its importance as we go towards heavy mass region due to isospin mixing caused by the growing Coulomb forces. However, it was realized quite early that isospin could become an important and useful quantum number for all nuclei including heavy nuclei due to neutron richness of the systems [1]. Lane and Soper [2] also showed in a theoretical calculation that isospin indeed remains quite good in heavy mass neutron rich systems. In this paper, we present isospin based calculations [3, 4] for the fission fragment distributions obtained from heavy-ion fusion fission reactions. We discuss in detail the procedure adopted to assign the isospin values and the role of neutron multiplicity data in obtaining the total fission fragment distributions. We show that the observed fragment distributions can be reproduced rather reasonably well by the calculations based on the idea of conservation of isospin. This is a direct experimental evidence of the validity of isospin in heavy nuclei, which arises largely due to the neutron-rich nature of heavy nuclei and their fragments. This result may eventually become useful for the theories of nuclear fission and also in other practical applications.

THE ROLE OF NUCLEAR FISSION IN NUCLEAR WASTE INCINERATION

2000 ◽  
Author(s):  
GABRIELE FIONI ◽  
OLIVIER DERUELLE ◽  
FREDERIC MARIE ◽  
STEFAN ROETTGER
Keyword(s):  
Nuclear Waste ◽  
Waste Incineration ◽  
Nuclear Fission

NUCLEAR FISSION WITHIN THE MEAN-FIELD APPROACH

2009 ◽  
Vol 18 (04) ◽  
pp. 798-807 ◽  
Author(s):  
J. SKALSKI
Keyword(s):  
Simple Model ◽  
Density Matrix ◽  
Hermitian Operator ◽  
Mean Field ◽  
Nuclear Fission ◽  
Decay Rates ◽  
Instanton Action ◽  
Field Approach ◽  
The Mean

We discuss the mean-field instanton method for calculating decay rates of the sponteneous fission. Based on our recent work, we stress the role of the velocity-momentum relations which make the instanton action minimal, and the choice of a time-even density matrix and a time-odd hermitian operator as special variables making the adiabatic limit transparent. We also present an analytic study of a simple model of barrier tunneling, which illustrates the importance of the velocity-momentum constraints.

ON THE ROLE OF THE WEAK INTERACTION IN THE PROCESS OF NUCLEAR FISSION

2006 ◽  
Vol 15 (02) ◽  
pp. 393-404
Author(s):  
KLAUS DIETRICH
Keyword(s):  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Weak Interaction ◽  
Nuclear Fission ◽  
Low Energy ◽  
Time Dependent ◽  
Parity Doublet ◽  
Microscopic Description ◽  
Enhancement Mechanism

We investigate the effect of the parity-violating weak interaction in the process of n-induced low-energy fission within a time-dependent microscopic description. We display two different mechanisms of enhancement: a) the well-known enhancement due to the chaotic complexity of compound nuclear states and the concomitant high density of levels, b) an additional dynamical enhancement which arises whenever the substates of a parity doublet cross as a function of the intrinsic octupole moment Q30 on the way to fission. In the last section we discuss other examples of this additional enhancement mechanism which is due to a spontaneous symmetry breaking.

Role of deformed shell effects on the mass asymmetry in nuclear fission of mercury isotopes

2012 ◽  
Vol 86 (6) ◽  
Author(s):  
Stefano Panebianco ◽  
Jean-Luc Sida ◽  
Héloise Goutte ◽  
Jean-François Lemaître ◽  
Noël Dubray ◽  
...  
Keyword(s):  
Nuclear Fission ◽  
Shell Effects ◽  
Mass Asymmetry ◽  
Mercury Isotopes
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