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

Universidade de Santiagode Compostela

Michigan State University

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

Universidad de 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

GSI Helmholtz Centre for Heavy Ion Research

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

EU Joint Research Centre (JRC)

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

Universidade de Santiagode Compostela

Grand Accélérateur National d'Ions Lourds (GANIL)

D. M. Rossi

GSI Helmholtz Centre for Heavy Ion Research

H. Simon

GSI Helmholtz Centre for Heavy Ion Research

J. Taieb

The French Alternative Energies and Atomic Energy Commission (CEA)

J. Vargas

Universidade de Santiagode Compostela

B. Voss

GSI Helmholtz Centre for Heavy Ion Research

Physical Review C - Nuclear Physics

0556-2813 (ISSN) 1089-490X (eISSN)

Vol. 92 4 044612

Subject Categories

Subatomic Physics

DOI

10.1103/PhysRevC.92.044612

More information

Latest update

6/11/2018