Influence of proton and neutron deformed shells on the asymmetric fission of thorium isotopes
Journal article, 2022
Mean values of the number of protons and neutrons of the primary fission fragments at scission are determined for the asymmetric fission of 16 fissioning isotopes, from Ac-219 up to Np-238. Our results confirm that the main asymmetric fission mode around the heavier uranium isotopes is indeed characterized by an average atomic number around (Z(H)) = 54 in the heavy fission fragments. However, they also unambiguously show a stabilization effect in the light fission fragments around (N-L) = 52-54 in the neutron-deficient thorium and actinium isotopes. This is a clear signature that these deformed proton and neutron shell closures around 54 play a major role in the nuclear fission process. The evolution along the thorium chain shows that the neutron shell appears to be dominant in the asymmetric fission of the lighter thorium isotopes, in contrast to the heavier thorium isotopes for which the stabilization originates from the proton shell.
Author
A. Chatillon
The French Alternative Energies and Atomic Energy Commission (CEA)
University Paris-Saclay
J. Taieb
University Paris-Saclay
The French Alternative Energies and Atomic Energy Commission (CEA)
Andreas Martin Heinz
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
H. Alvarez-Pol
Universidade de Santiagode Compostela
L. Audouin
University Paris-Saclay
Y. Ayyad
Universidade de Santiagode Compostela
Michigan State University
G. Belier
The French Alternative Energies and Atomic Energy Commission (CEA)
University Paris-Saclay
J. Benlliure
Universidade de Santiagode Compostela
G. Boutoux
The French Alternative Energies and Atomic Energy Commission (CEA)
M. Caamano
Universidade de Santiagode Compostela
E. Casarejos
University of Vigo
D. Cortina-Gil
Universidade de Santiagode Compostela
A. Ebran
University Paris-Saclay
The French Alternative Energies and Atomic Energy Commission (CEA)
F. Farget
Centre national de la recherche scientifique (CNRS)
B. Fernandez-Dominguez
Universidade de Santiagode Compostela
T. Gorbinet
The French Alternative Energies and Atomic Energy Commission (CEA)
L. Grente
The French Alternative Energies and Atomic Energy Commission (CEA)
Håkan T Johansson
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
B. Jurado
Centre national de la recherche scientifique (CNRS)
A. Kelic-Heil
Helmholtz
N. Kurz
Helmholtz
B. Laurent
University Paris-Saclay
The French Alternative Energies and Atomic Energy Commission (CEA)
J. - Martin
The French Alternative Energies and Atomic Energy Commission (CEA)
C. Nociforo
Helmholtz
C. Paradela
Universidade de Santiagode Compostela
E. Pellereau
The French Alternative Energies and Atomic Energy Commission (CEA)
S. Pietri
Helmholtz
A. Prochazka
Helmholtz
J. L. Rodriguez-Sanchez
Helmholtz
Universidade de Santiagode Compostela
D. Rossi
Technische Universität Darmstadt
Helmholtz
H. Simon
Helmholtz
J. Vargas
Saint Thomas Aquinas University
Universidade de Santiagode Compostela
B. Voss
Helmholtz
H. Weick
Helmholtz
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 106 2 024618Subject Categories
Subatomic Physics
Geology
Geochemistry
DOI
10.1103/PhysRevC.106.024618