Constraining the level density using fission of lead projectiles
Artikel i vetenskaplig tidskrift, 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.

Författare

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

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

G. Boutoux

Universite de Bordeaux

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

E. Casarejos

Universidad de Vigo

A. Chatillon

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

D. Cortina-Gil

Universidade de Santiagode Compostela

T. Gorbinet

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

Andreas Martin Heinz

Chalmers, Fundamental fysik

A. Kelic-Heil

GSI Helmholtzzentrum für Schwerionenforschung

B. Laurent

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

J. F. Martin

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

C. Paradela

EU Joint Research Centre (JRC)

Universidade de Santiagode Compostela

E. Pellereau

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (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 Helmholtzzentrum für Schwerionenforschung

H. Simon

GSI Helmholtzzentrum für Schwerionenforschung

J. Taieb

Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)

J. Vargas

Universidade de Santiagode Compostela

B. Voss

GSI Helmholtzzentrum für Schwerionenforschung

Physical Review C - Nuclear Physics

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

Vol. 92 4 044612

Ämneskategorier

Subatomär fysik

DOI

10.1103/PhysRevC.92.044612

Mer information

Senast uppdaterat

2018-06-11