Presaddle and postsaddle dissipative effects in fission using complete kinematics measurements
Journal article, 2016
A complete kinematics measurement of the two fission fragments was used for the first time to investigate fission dynamics at small and large deformations. Fissioning systems with high excitation energies, compact shapes, and low angular momenta were produced in inverse kinematics by using spallation reactions of lead projectiles. A new generation experimental setup allowed for the first full and unambiguous identification in mass and atomic number of both fission fragments. This measurement permitted us to accurately determine fission cross sections, the charge distribution, and the neutron excess of the fission fragments as a function of the atomic number of the fissioning system. These data are compared with different model calculations to extract information on the value of the dissipation parameter at small and large deformations. The present results do not show any sizable dependence of the nuclear dissipation parameter on temperature or deformation.
Author
J. L. Rodriguez-Sanchez
Universidade de Santiagode Compostela
J. Benlliure
Universidade de Santiagode Compostela
J. Taieb
The French Alternative Energies and Atomic Energy Commission (CEA)
H. Alvarez-Pol
Universidade de Santiagode Compostela
L. Audouin
Institut de Physique Nucleaire Orsay
Y. Ayyad
Michigan State University
Universidade de Santiagode Compostela
G. Belier
The French Alternative Energies and Atomic Energy Commission (CEA)
G. Boutoux
University of Bordeaux
The French Alternative Energies and Atomic Energy Commission (CEA)
E. Casarejos
University of Vigo
A. Chatillon
The French Alternative Energies and Atomic Energy Commission (CEA)
D. Cortina-Gil
Universidade de Santiagode Compostela
T. Gorbinet
The French Alternative Energies and Atomic Energy Commission (CEA)
Andreas Martin Heinz
Chalmers, Physics, Subatomic and Plasma Physics
A. Kelic-Heil
Helmholtz
B. Laurent
The French Alternative Energies and Atomic Energy Commission (CEA)
J. F. Martin
The French Alternative Energies and Atomic Energy Commission (CEA)
C. Paradela
Joint Research Centre (JRC), European Commission
Universidade de Santiagode Compostela
E. Pellereau
The French Alternative Energies and Atomic Energy Commission (CEA)
B. Pietras
Universidade de Santiagode Compostela
D. Ramos
Universidade de Santiagode Compostela
C. Rodriguez-Tajes
Grand Accélérateur National d'Ions Lourds (GANIL)
Universidade de Santiagode Compostela
D. M. Rossi
Helmholtz
H. Simon
Helmholtz
J. Vargas
Universidade de Santiagode Compostela
B. Voss
Helmholtz
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 94 6 061601Subject Categories
Subatomic Physics
DOI
10.1103/PhysRevC.94.061601