Constraining the level density using fission of lead projectiles
Journal article, 2015
The nuclear level density is one of the main ingredients for the statistical description of the fission process. In this work, we propose to constrain the description of this parameter by using fission reactions induced by protons and light ions on Pb208 at high kinetic energies. The experiment was performed at GSI (Darmstadt), where the combined use of the inverse kinematics technique with an efficient detection setup allowed us to measure the atomic number of the two fission fragments in coincidence. This measurement permitted us to obtain with high precision the partial fission cross sections and the width of the charge distribution as a function of the atomic number of the fissioning system. These data and others previously measured, covering a large range in fissility, are compared to state-of-the-art calculations. The results reveal that total and partial fission cross sections cannot unambiguously constrain the level density at ground-state and saddle-point deformations and additional observables, such as the width of the charge distribution of the final fission fragments, are required.
Author
J. L. Rodriguez-Sanchez
Universidade de Santiagode Compostela
J. Benlliure
Universidade de Santiagode Compostela
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
The French Alternative Energies and Atomic Energy Commission (CEA)
University of Bordeaux
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, Fundamental 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
Universidade de Santiagode Compostela
Joint Research Centre (JRC), European Commission
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. Taieb
The French Alternative Energies and Atomic Energy Commission (CEA)
J. Vargas
Universidade de Santiagode Compostela
B. Voss
Helmholtz
Physical Review C - Nuclear Physics
24699985 (ISSN) 24699993 (eISSN)
Vol. 92 4 044612Subject Categories
Subatomic Physics
DOI
10.1103/PhysRevC.92.044612