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

APPEARANCE OF NUCLEAR SHELL EFFECTS AND INITIAL CHARGE (MASS) ASYMMETRY IN THE FORMATION OF PRODUCTS OF HEAVY ION COLLISIONS

2011 ◽  
Vol 20 (02) ◽  
pp. 406-414 ◽  
Author(s):  
AVAZBEK NASIROV ◽  
GIOVANNI FAZIO ◽  
GIORGIO GIARDINA ◽  
GIUSEPPE MANDAGLIO ◽  
MARINA MANGANARO ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Reaction Products ◽  
Shell Effects ◽  
Mass Asymmetry ◽  
Ion Collisions ◽  
Initial Charge ◽  
Evaporation Residues ◽  
Nuclear Shell ◽  
Nuclear Shell Effects

The role of the entrance channel in the formation of the reaction products is discussed. The excitation functions of evaporation residues for the 50 Ti +249 Cf and 54 Cr +248 Cm reactions are compared.

scholarly journals Shells, Anti-Shells and Modes in nuclear Fission

2018 ◽  
Vol 193 ◽  
pp. 01001
Author(s):  
Friedrich Gönnenwein
Keyword(s):  
Liquid Drop ◽  
Nuclear Fission ◽  
Angular Distributions ◽  
Special Issue ◽  
Shell Effects ◽  
Present Purpose ◽  
Charge Stability ◽  
Characteristic Features

Fission phenomena are surveyed where fragment properties are catching the eye. Beyond the Liquid Drop the relevant properties of fragments are shell effects and nuclear pairing. Shell effects influence on mass, charge, stability and deformability of fragments. Most often only the stabilizing effects of shells are discussed and the equally frequent destabilizing effects are not mentioned. For the present purpose the terms shells and anti-shells are used in case of stabilizing and destabilizing effects, respectively. Fragment shells and anti-shells lead to fission modes with characteristic properties. A special issue is where in the course of fission these modes assume their characteristic features. Surprisingly fragment angular distributions in above- and sub-barrier fission help elucidating this question. The discussion is focussed on fission in the standard actinides.

scholarly journals Study of High-Energy Fission in Inverse Kinematics

2019 ◽  
Vol 223 ◽  
pp. 01037
Author(s):  
G. Mantovani ◽  
D. Ramos ◽  
M. Caamaño ◽  
A. Lemasson ◽  
M. Rejmund ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Excitation Energy ◽  
Shell Structure ◽  
Inverse Kinematics ◽  
High Energy ◽  
Total Kinetic Energy ◽  
High Excitation Energy ◽  
High Excitation ◽  
Shell Effects

Fission at low excitation energy, is a process in which both macroscopic and microscopic aspects are involved. Some features in the total kinetic energy and in the N/Z distributions of the fragments, commonly associated with shell effects, came out in a series of recent experiments with high excitation energy fusionfission reactions in inverse kinematics. In the latest experiment of this campaign, a study of high-energy fission and quasi-fission between a 238U beam and a series of light targets was carried out by using the aforementioned technique, in order to probe the role of the shell structure in these processes.

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
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